v-Stems and Other Stem Allomorphy: Contrasts and Learner Traps | Hungarian Grammar

The essential contrast is lexical: not every noun ending in ó/ő has a v-stem, and even one v-stem noun may distribute its allomorphs differently from another. Compare ló – lovak “horse – horses” with regular autó – autók “car – cars,” or kő – kövek “stone – stones” with nő – nők “woman – women.” The final vowel alone cannot predict the paradigm.

Use this page to make the difficult decisions. The forms page gives the paradigms, and the usage page places them in discourse. All unlabeled examples represent neutral modern standard Hungarian.

v-stem versus regular vowel-final stem

These matched pairs isolate lexical class while keeping the surface ending similar.

Citation form	Plural	Accusative	Class
ló	lovak	lovat	v-stem, back
autó	autók	autót	regular vowel-final, back
kő	kövek	követ	v-stem, front rounded
nő	nők	nőt	regular vowel-final, front rounded
szó	szavak	szót	split v-stem distribution, back
só	sók	sót	regular vowel-final, back

A mezőn két ló és három autó állt egymás mellett.

Two horses and three cars stood next to each other in the field.

A gazda eladta a lovakat, a régi autókat viszont megtartotta.

The farmer sold the horses but kept the old cars.

A kertész félretette a köveket, a látogatók pedig félretolták a székeket.

The gardener set the stones aside, while the visitors moved the chairs aside.

No productive rule turns every final ó into ov or every final ő into öv. A new loan ending in ó normally follows the regular class unless speakers lexicalize a different pattern. The v-stems are a small inherited group and must be learned as paradigms.

The three core nouns do not behave identically

Ló and kő use their v-stems in the singular accusative, plural, possessive forms, and the superessive: lovat, lovak, lovam, lovon; követ, kövek, kövem, kövön. Szó uses szav- in the plural and possessive family but normally keeps szó- in the singular accusative and superessive: szót, szavak, szavam, szón.

Egy lovat láttam a réten, egy madár pedig a kövön ült.

I saw a horse in the meadow, while a bird was sitting on the stone.

A szerkesztő egy szót kihúzott, majd átrendezte a mondat többi szavát.

The editor crossed out one word and then rearranged the other words in the sentence.

Egyetlen szón múlhat, hogy a kérés udvariasnak vagy követelőzőnek hangzik.

A single word can determine whether the request sounds polite or demanding.

The contrast between szót and szavakat is not driven by number as meaning alone. It reflects which morphological forms have conventionalized which stem. This is an honest irregularity, not a hidden semantic distinction.

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Store szó – szót – szavak – szavam – szón together. Treating szav- as an all-purpose “real stem” produces errors precisely where modern Hungarian preserves szó-.

v-insertion versus vowel shortening

Shortened stems change vowel length without adding v: kéz – kezek, víz – vizek, út – utak, nyár – nyarak. Their distribution overlaps with v-stems—plural, linked accusative, and possessive forms often select the alternate stem—but their phonological result differs.

A lovak egy köves úton haladtak a folyó felé.

The horses were moving along a stony road toward the river.

Az úton nem volt víz, ezért a túrázók vizet kértek a faluban.

There was no water on the road, so the hikers asked for water in the village.

Here úton keeps long ú, while utat and utak have short u. Similarly, vízben contrasts with vizet, and kézzel with kezet. Do not insert a v by analogy: neither vizev nor kevek belongs to these paradigms.

Harmony, rounding, and linking vowels are separate layers

The same noun may display different suffix vowels because different suffix families ask different questions:

kőhöz: the allative has three harmonic forms, and rounded ő selects -höz;
kővel: the instrumental has only back/front -val/-vel, so there is no -völ;
kövön: the superessive selects the v-stem and rounded -ön;
kövek: the lexical plural uses linking e, not the phonologically tempting ö.

A kövekhez vezető ösvényen állj meg annál a nagy kőnél!

On the path leading to the stones, stop by that large stone!

Ezzel a kővel jelöltük meg azt a helyet, ahol a következő követ találtuk.

We marked with this stone the place where we found the next stone.

English speakers often choose from the closest written vowel: they see ő and try kövök, or see í in híd and try híddel. That shortcut fails twice. Linking vowels are partly lexical, and neutral-vowel stems may belong lexically to the back class: standard híddal, but front vízzel.

A régi híddal sok gond volt, de a vízzel nem volt semmi baj.

There were many problems with the old bridge, but there was nothing wrong with the water.

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First choose the stem allomorph; then identify whether the suffix has two forms, three forms, or a lexical linking vowel. “Use the nearest vowel” is not a complete Hungarian rule.

Compounds: the final lexical member keeps its class

Transparent compounds whose final member is a v-stem normally preserve its alternation: versenyló – versenylovak, mérföldkő – mérföldkövek, kulcsszó – kulcsszavak. The earlier member does not block the lexical class of the head.

A pályán már felsorakoztak a versenylovak.

The racehorses have already lined up on the track.

A megállapodás fontos mérföldkő, de több kulcsszót még pontosítani kell.

The agreement is an important milestone, but several keywords still need clarification. (formal)

Lexicalized derivatives may choose a different family member: szóbeli uses szó-, while háromszavas uses szav-. There is no license to coin szavbeli or háromszós by applying one stem mechanically.

Information structure does not change the allomorph

Focus can move an inflected noun directly before the verb and give it strong stress, but it cannot restore the citation stem inside that form.

Tegnap lovakat láttam a dombon.

Yesterday I saw horses on the hill.

LOVAKAT láttam a dombon, nem szarvasokat.

I saw HORSES on the hill, not deer.

The capitals mark corrective focus for teaching. Lovakat remains lov-ak-at in both sentences. A pause, slower delivery, or emphatic stress may make each segment clearer, but the morphology does not become lókat.

Register-sensitive choices

The allomorphs themselves are not formal or informal. Register affects word choice and syntax around them. Szóbeli nyilatkozatot tett is (formal); mondott róla pár szót is (informal). Both use standard members of the szó/szav- family.

A szóvivő szóbeli nyilatkozatot tett, de bizonyos szavakat gondosan elkerült.

The spokesperson made an oral statement but carefully avoided certain words. (formal)

Mondott róla pár szót, aztán gyorsan témát váltott.

He said a few words about it, then quickly changed the subject. (informal)

Regional pronunciation may shorten some long vowels differently (regional: various areas), but standard inflection and spelling retain the lexical contrast presented here. Do not treat an individual pronunciation as permission to rewrite vízben as vizben.

Decision tree

When a noun ends in a long vowel or belongs to a changing-stem family, decide in this order:

Is the noun known to be a v-stem? If no, use its regular or other lexical paradigm: autók, nők, sók.
Which noun is it? For ló/kő, expect lov-/köv- broadly before plural, linked accusative, possessive, and superessive morphology. For szó, check the narrower distribution.
Is it a shortening stem instead? Use kez-, viz-, ut-, nyar- in the specified environments, with no inserted v.
Has a plural or possessive suffix already selected an allomorph? Keep it through later suffixes: lovakban, köveket, vizeinkből.
What inventory does the next suffix have? Apply two-way backness, three-way rounding, or a lexical linking vowel only now.
Is the form a compound or derivative? Let the final lexical member keep its paradigm, but learn conventional derivatives individually.

Diagnostic exercise

Choose the standard form and explain the contrast.

“horses”: lovak or lók?
“cars”: autók or autovak?
“one word” as a direct object: egy szót or egy szavat?
Which is the safest neutral ordinary plural for “words”: szavak or szók?
“with the stone”: kővel or kövvel?
“on the stone”: kövön or kőn?
Why are vízben and vizet both standard?
Which is correct: híddal or híddel?

Answers: (1) lovak, because ló is a v-stem. (2) autók, because autó is regular and vowel-final. (3) egy szót; modern singular accusative keeps szó-. (4) Szavak is the safest neutral ordinary plural. Szók also occurs, especially in linguistic compounds and some established expressions, but it is not a free replacement in every context. (5) Kővel, because the vowel-final stem takes -vel with its v intact. (6) Kövön, because the superessive selects köv-. (7) Víz is a shortening stem: consonant-initial -ben preserves víz-, while the linked accusative selects viz-. (8) Híddal; híd is lexically back-harmonic despite containing only neutral í.

Common Mistakes

1. Extending the v-stem pattern to an ordinary vowel-final noun.

❌ Az autovak a szálloda előtt várnak.

Incorrect — autó is a regular vowel-final noun.

✅ Az autók a szálloda előtt várnak.

The cars are waiting in front of the hotel.

2. Using the same allomorph of szó everywhere.

❌ Ezt a szavat nem értem.

Incorrect in neutral modern usage — the singular accusative is szót.

✅ Ezt a szót nem értem.

I don't understand this word.

3. Letting rounded ő dictate a lexical plural vowel.

❌ A mérföldkövök jól láthatók az út mellett.

Incorrect — the final member kő has the plural mérföldkövek.

✅ A mérföldkövek jól láthatók az út mellett.

The milestones are clearly visible beside the road.

4. Applying front harmony to a lexically back neutral-vowel noun.

❌ A híddel hónapok óta gond van.

Incorrect — híd takes back-harmonic -dal after assimilation.

✅ A híddal hónapok óta gond van.

There has been a problem with the bridge for months.

Key Takeaways

Final ó/ő does not predict v-stem membership: compare ló – lovak with autó – autók, and kő – kövek with nő – nők.
Szó splits its paradigm: szót, szón, but szavak, szavam.
Vowel shortening (víz – vizet) resembles v-stem distribution but adds no consonant.
Focus and register change delivery or vocabulary, not the required allomorph.
Stem selection precedes harmony, rounding, linking-vowel choice, and later suffixes.

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