Proverb: A caval donato non si guarda in bocca

A caval donato non si guarda in bocca is one of those proverbs that sounds older than its English equivalent — and it is. Both languages descend from the same medieval European source, but Italian preserves a clue that English has lost: the apocopated caval instead of cavallo. That truncated form, kept for rhythm, drops you straight into the horse-trading culture of pre-modern Europe, where examining a horse's teeth was the standard way to assess its age and value, and looking in the mouth of a gift horse was an unthinkable rudeness.

This page walks through the proverb's grammar — the fronted prepositional phrase, the past participle as adjective, the impersonal si, and the apocope — and unpacks the cultural and linguistic backstory that makes it one of the most quoted proverbs in modern Italian.

The text

A caval donato non si guarda in bocca.

Eight words. One topicalized prepositional phrase, one past participle modifying a noun, one impersonal verb, one location complement. Together they state a rule of social etiquette dating back centuries.

Grammar in action

Word by word

• A — the preposition a (to, at, on). Here it marks the indirect object or focus: "as for a gift horse."
• caval — apocopated form of cavallo (horse). The final -lo is dropped. We'll come back to this in detail.
• donato — past participle of donare (to give as a gift), used here as an adjective modifying caval. "Given (as a gift)."
• non — preverbal negator.
• si — the impersonal clitic pronoun, marking that the action has no specific subject. "One does not," "you don't," "people don't."
• guarda — third-person singular present indicative of guardare (to look). With si, the meaning is impersonal: "one looks."
• in bocca — preposition + noun = "in the mouth." The location where the looking would happen.

The fronted prepositional phrase: topicalization

In neutral Italian word order, the proverb would read non si guarda in bocca a un cavallo donato ("one doesn't look in the mouth of a gift horse"). The actual proverb fronts a caval donato to the very beginning. This kind of fronting is called topicalization: the speaker pulls the topic — the thing the rule is about — out in front, and then comments on it.

Topicalization is one of Italian's favorite rhetorical moves, and proverbs use it constantly. By placing a caval donato first, the proverb signals: "Concerning a gift horse — here's the rule." The English translation has to flatten this back into normal word order ("don't look a gift horse in the mouth") because English topicalization sounds awkward in proverbs.

The past participle as adjective: caval donato

Donato is the past participle of donare (to give as a gift). On its own, the verb means specifically to give as a gift, distinct from dare (to give in general) — donare implies generosity, a gift with no expectation of return.

In the proverb, donato is used adjectivally: it modifies caval, agreeing with it in gender (masculine) and number (singular). The phrase un caval donato is structurally the same as un libro letto (a read book) or una porta chiusa (a closed door) — past participle agreeing with the noun, describing a state resulting from a previous action.

This is part of a broader Italian pattern called the reduced relative clause: instead of saying un cavallo che è stato donato (a horse that has been given), Italian compresses this into un caval donato. The relative pronoun and auxiliary disappear; the past participle does all the work.

Apocope: caval for cavallo

The most distinctive feature of the proverb is the form caval. In modern standard Italian, the noun is cavallo (a stallion of a horse). But in poetry, songs, proverbs, and older Italian, the final -lo can drop, leaving caval. This dropping is called apocope — from the Greek apokopē, "cutting off."

Apocope was widespread in older Italian, where it served two purposes: it tightened the rhythm of a verse, and it gave a more literary or solemn flavor. Modern standard Italian generally avoids it, but a handful of apocopated forms survive — almost all of them in fixed expressions, poetry, song lyrics, and proverbs.

A short tour of preserved apocopes:

The last two are the only living apocopes in everyday Italian: titles like Signor, Dottor, Professor always drop the final vowel before a proper name. The rest are confined to literary, sung, or proverbial contexts.

In the proverb, caval is doing exactly what amor and fior do in old songs and lines of verse: it's a literary echo that gives the saying its dignified, slightly archaic flavor. Replacing it with cavallo (a cavallo donato non si guarda in bocca) is grammatically possible — and you'll hear it occasionally — but it loses the rhythm and the feeling that this is a proverb rather than a sentence.

The impersonal si: a generic injunction

Non si guarda is built with the impersonal si construction. Si here is not a reflexive pronoun in the usual sense — it's a clitic that signals an unspecified subject. The literal translation is something like "one doesn't look," but in everyday English we render it more naturally as "you don't look" or simply "don't look."

Italian has a robust impersonal-si system that's used for generic statements, instructions, and rules. Compare:

• Non si fuma in casa. — One doesn't smoke in the house. / No smoking in the house.
• In Italia si beve molto caffè. — In Italy people drink a lot of coffee.
• Come si dice "thank you" in italiano? — How does one say "thank you" in Italian?

The si + third-person singular pattern produces a generic statement. In the proverb, non si guarda is the perfect form for a rule that applies to everyone: not "don't you look" (addressed to a specific person) but "looking in this case isn't done" (applies to everyone, always).

This is why the proverb feels softer than a direct command. Non guardare would be addressed to "you"; non si guarda is addressed to all of us at once.

In bocca — preposition + bare noun

Italian uses in + bare noun to express location for many body parts and containers: in mano (in hand), in tasca (in pocket), in testa (in the head, on the head), in bocca (in the mouth). No article. This is a small but stubborn pattern that English speakers often get wrong by inserting the.

The bare-noun pattern is generic and idiomatic — it specifies location without the specificity that the article would add.

Cultural background: the medieval horse-trade

The proverb is European folklore at least a thousand years old. Latin medieval forms — noli equi dentes inspicere donati — survive in writings of the Church Fathers. The image is of a horse buyer at the medieval market, who would lift the horse's lip and inspect its teeth. A horse's teeth tell you, with surprising precision, the animal's age: young horses have smooth, white teeth; older horses have worn, yellowed, sometimes hooked teeth ("long in the tooth" is the same idea, in English). A buyer who didn't check the teeth was easily cheated; a seller who let the buyer check was honest.

But if the horse was a gift, inspecting the teeth was an insult: it implied you were assessing the horse's value, treating the gift as a transaction rather than an act of generosity. Hence the rule: a gift horse, you accept; you don't appraise.

Italians use the proverb today for any gift, not just literal horses. Someone who complains about a present they've received — the color of the scarf, the brand of the chocolates, the size of the sweater — gets the proverb thrown at them. It's a soft rebuke, almost always delivered with a smile.

Variations and word order

Without fronting: Non si guarda in bocca a caval donato

This is the same proverb with neutral word order: the prepositional phrase moves to its normal post-verbal position. You'll hear this version too, especially in slightly more colloquial speech. The fronted version is more "proverb-like"; the unfronted version is more "spoken-sentence-like." Both are correct.

Cousins in other languages

This proverb is a pan-European one, with near-identical forms in many languages:

• English: Don't look a gift horse in the mouth.
• Spanish: A caballo regalado no se le miran los dientes. / No le mires el diente al caballo regalado.
• French: À cheval donné on ne regarde pas la bride. (Note: bridle, not mouth — the French version checks the bridle for quality instead.)
• German: Einem geschenkten Gaul schaut man nicht ins Maul. (Same image, with rhyme.)
• Portuguese: A cavalo dado não se olha o dente.

The shared image, the shared moral, and the shared grammatical strategy (impersonal subject + negative + horse-as-recipient) all point to a common medieval Latin ancestor that traveled with the horse trade across Europe.

When to use this proverb

The proverb has a narrow but very common use: someone has received a gift and is criticizing it, and you want to remind them that gratitude is in order. The tone is gentle but firm — you're not really telling them off, but you are telling them they're being ungrateful.

Three typical situations:

1. A relative or friend's complaint about a present. The classic case. Aunt sent the wrong size, the colleague chose an ugly tie, the partner picked a so-so book. Dai, a caval donato non si guarda in bocca.
2. A favor with imperfect terms. Someone gave you a ride but the car was uncomfortable; someone offered you a place to stay but it's small. Ti hanno offerto un passaggio gratis e ti lamenti? A caval donato non si guarda in bocca.
3. A windfall with strings. A bonus, an inheritance, an unexpected discount that comes with some inconvenience. The proverb reminds you to take the good with the small bad.

It's not used to defend a gift that's actively harmful or insulting — only to defuse petty complaints. If someone gives you something genuinely problematic, the proverb is the wrong tool.

Common Mistakes

Key takeaways

• The fronted prepositional phrase a caval donato is topicalization — Italian's favorite proverb-opening move.
• Donato is a past participle as adjective, modifying caval — a reduced relative clause meaning "(that has been) given as a gift."
• Caval is apocope: the final -lo drops for rhythm, a literary feature surviving in proverbs, songs, and titles.
• Si is the impersonal clitic that turns guarda into a generic statement: "one doesn't look," not "you don't look."
• In bocca is the bare-noun location pattern Italian uses for body parts and containers — no article needed.
• The proverb is one of the most pan-European proverbs alive: nearly identical versions exist in Spanish, French, German, Portuguese, and English.
• Use the proverb to gently push back against someone complaining about an imperfect gift — never for serious harm.

For more on the impersonal si construction, see si impersonale. For the topicalization pattern, see word-order flexibility. For other proverbs, see the proverbs collection.