Mistake: Translating his/her Wrong | Romanian Grammar

English possessives encode the owner's sex: his book means a male owner, her book a female owner — and the word doesn't care what the book is. Romanian's third-person possessive său / sa / săi / sale works on the opposite principle: it agrees with the thing possessed, and tells you nothing about the owner's sex. Cartea sa is feminine not because the owner is female but because carte ("book") is feminine. It means his book or her book — Romanian simply doesn't mark that distinction here. English speakers, hunting for a way to say "his," reach for the masculine-looking său whenever the owner is male, producing cartea său ("his book"). That's wrong: the noun is feminine, so it must be cartea sa, regardless of who owns it. The fix is to stop thinking about the owner when you use său/sa — match the form to the possessed noun — and to switch to a different construction (lui / ei) only when you genuinely need to flag the owner's identity.

The core flip: agreement is with the possessed noun

Său is the family of forms that agrees, like an adjective, with the noun it sits on:

Possessed noun	Form	Example	Means
masc. sing.	său	câinele său	his/her dog
fem. sing.	sa	cartea sa	his/her book
masc. plur.	săi	copiii săi	his/her children
fem. plur.	sale	ideile sale	his/her ideas

Every one of these is ambiguous as to owner: cartea sa could be a man's or a woman's book. The -a of sa comes from carte, not from any female owner.

Cartea sa e pe masă.

His/her book is on the table. (sa = feminine, agreeing with cartea)

Câinele său latră toată noaptea.

His/her dog barks all night. (său = masculine, agreeing with câinele)

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When you use său/sa/săi/sale, ignore the owner entirely and look only at the noun being possessed. Feminine noun → sa; masculine noun → său; and so on. Cartea sa, câinele său — the form tracks the book and the dog, not the man or woman who owns them.

The flagship error: cartea său

The error comes from translating "his" as a fixed masculine word. Because carte is feminine, "his book" cannot be cartea său; the possessive must agree feminine: cartea sa. Likewise "her dog" is not câinele sa — câine is masculine, so it's câinele său, even though the owner is female.

❌ cartea său

Incorrect — carte is feminine, so the possessive is sa: cartea sa.

✅ cartea sa

his/her book

❌ câinele sa (for 'her dog')

Incorrect — câine is masculine, so it's său regardless of the owner: câinele său.

✅ câinele său

his/her dog

Și-a vândut casa, dar și-a păstrat mașina sa veche.

He/she sold the house but kept his/her old car. (mașina sa — feminine noun)

When you DO need to mark the owner: lui / ei

Because său/sa hides the owner's sex, Romanian offers a second, very common way to say "his/her" that does mark the owner: the genitive of the personal pronoun — lui ("his / of him") and ei ("her / of her"). These don't agree with anything; they are frozen forms placed after the possessed noun.

Owner	Word	Example	Means
male owner	lui	cartea lui	his book (a man's)
female owner	ei	cartea ei	her book (a woman's)

So for the same "book," you have two correct options with different logic:

cartea sa

his/her book (agrees with 'book'; owner's sex unspecified)

cartea lui

his book (owner is male, explicitly)

cartea ei

her book (owner is female, explicitly)

In everyday speech, lui and ei are actually the default for living people, precisely because they disambiguate the owner. Său/sa leans a touch more formal or literary and is especially common when the owner is the sentence's subject (a "his own" flavor). For objects and abstractions, său/sa stays very normal.

Maria mi-a arătat fotografiile ei din vacanță.

Maria showed me her vacation photos. (ei — owner is clearly Maria; very natural in speech)

Scriitorul și-a publicat ultima sa carte anul trecut.

The writer published his latest book last year. (sa — formal/literary flavor, owner = subject)

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Two correct paths. Use său/sa (agreeing with the possessed noun) when the owner's sex is clear from context or irrelevant — common in writing and with the subject as owner. Use lui (male) or ei (female) when you want to pin down whose it is; this is the everyday spoken default for people.

Why English speakers get this backwards

The whole difficulty is that the two languages put the gender agreement in different places. English: the possessive agrees with the owner (his/her), and the possessed thing is invariant. Romanian său/sa: the possessive agrees with the possessed thing, and the owner is invariant (unmarked). They are mirror images. An English speaker's instinct — "the owner is a man, so I need the masculine word" — is exactly the wrong instinct for său/sa, where the owner's sex is none of the form's business. The instinct is correct, however, for lui/ei, which is part of why those two are so welcome to learners: lui/ei behave like English, marking the owner. The trap is mixing the systems — putting său on a feminine noun because the owner is male.

Profesorul și elevii săi au plecat în excursie.

The teacher and his pupils went on a trip. (săi — masc. plural, agreeing with elevii)

I-am dat telefonul ei, nu pe al meu.

I gave her her phone, not mine. (ei — owner explicitly female)

Common Mistakes

A consolidated recap of this single confusion.

Don't put the masculine său on a feminine noun because the owner is male:

❌ Ion a uitat cheia său în mașină.

Incorrect — cheia (key) is feminine: cheia sa.

✅ Ion a uitat cheia sa în mașină.

Ion left his key in the car.

Don't put the feminine sa on a masculine noun because the owner is female:

❌ Ana și-a pierdut pașaportul sa.

Incorrect — pașaportul (passport) is masculine: pașaportul său.

✅ Ana și-a pierdut pașaportul său.

Ana lost her passport.

Don't use său when you specifically need to mark a female owner to avoid ambiguity:

❌ Asta e mașina său (meaning 'hers', pointing at a woman)

Misleading — său doesn't mark the owner; for an explicitly female owner say mașina ei.

✅ Asta e mașina ei.

That's her car.

Don't try to make lui / ei agree with the noun — they never change:

❌ cartea lia / cărțile luii

Incorrect — lui and ei are invariable: cartea lui, cărțile lui.

✅ cărțile lui

his books

Don't forget the noun usually carries the definite article with these possessives:

❌ sa carte e nouă

Incorrect — the noun takes its article and the possessive follows: cartea sa e nouă.

✅ Cartea sa e nouă.

His/her book is new.

Key Takeaways

său / sa / săi / sale agree with the thing possessed, not the owner — cartea sa = "his or her book," feminine because carte is.
The flagship error is cartea său; the fix is cartea sa (match the feminine noun).
To mark whose it is, use lui (male owner) or ei (female owner): cartea lui / cartea ei. These are invariable.
lui / ei are the everyday spoken default for people; său/sa leans formal/literary and is natural when the owner is the subject.
Don't transfer the English instinct: in English the possessive tracks the owner; with Romanian său/sa it tracks the possessed noun.

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