Vowel-Dropping and Vowel-Lengthening Stems: Contrasts and Learner Traps | Hungarian Grammar

The visible alternations in bokor–bokrot and alma–almát have different causes. Bokor selects a reduced stem bokr- in certain suffix environments; alma keeps all its segments but lengthens final a to á. Neither process is optional emphasis, and neither can be predicted by copying the closest vowel. This page resolves boundary cases; consult the forms page and usage page for the core paradigms.

Dropping stem versus stable lookalike

The shape of the nominative is only a clue. Bokor drops its second vowel in bokrot, bokrok, bokrom; similar-looking motor remains stable in motort, motorok, motorom. Eper gives epret, eprek, eprem, but ember gives embert, emberek, emberem.

Dictionary form	Accusative	Plural	Stem analysis
bokor	bokrot	bokrok	bokor ~ bokr-
motor	motort	motorok	stable motor-
eper	epret	eprek	eper ~ epr-
ember	embert	emberek	stable ember-

A bokrot átültetjük a kert másik végébe.

We're replanting the bush at the other end of the garden.

A motort holnap viszi el a szerelő.

The mechanic is taking the motor away tomorrow.

Epret kértem a palacsintához.

I asked for strawberries with the pancakes.

Ezt az embert már láttam valahol.

I've seen this man somewhere before.

These pairs are not governed by a clean phonetic formula. The resulting clusters bokr- and epr- are possible, but cluster possibility alone does not force deletion in every word. Principal parts carry lexical information.

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If two nominatives look alike, do not make them share a paradigm. Record bokor–bokrot but motor–motort, eper–epret but ember–embert.

Deletion environment versus full-stem environment

Even an alternating noun does not use its reduced stem everywhere. Compare vowel-initial accusative/linking patterns and superessive forms with consonant-initial cases:

bokrot, bokrok, bokrom, bokron use bokr-;
bokorban, bokornak, bokorhoz, bokortól use full bokor-;
tükröt, tükrök, tükröm, tükrön use tükr-;
tükörben, tükörnek, tükörhöz, tükörtől use full tükör-.

This produces meaningful local-case contrasts without making the stem change itself meaningful.

A labda a bokron akadt fenn.

The ball got caught on the bush.

A labda a bokorban maradt.

The ball remained inside the bush.

Foltot láttam a tükrön.

I saw a mark on the mirror.

Magamat láttam a tükörben.

I saw myself in the mirror.

The matched meanings “on” and “in” select different cases; their suffix architecture then selects the appropriate stem allomorph. English prepositions identify the semantic contrast but offer no clue about internal vowel deletion.

Lengthening versus an inherently long vowel

In alma–almát and körte–körtét, a short final stem vowel becomes long before the suffix. In kávé–kávét and autó–autót, the dictionary form already contains a long vowel. The suffixed results look parallel, but their analyses differ:

Pair	Analysis
körte → körtét	final e → é before -t
kávé → kávét	inherently long é remains long + -t
alma → almát	final a → á before -t
autó → autót	inherently long ó remains long + -t

Körtét ettem, és kávét ittam reggelire.

I ate a pear and drank coffee for breakfast.

Az almát az autóban felejtettem.

I left the apple in the car.

This matters when removing a suffix. From körtét, the dictionary form is körte, not körté; from kávét, it is kávé. A learner needs the citation form, not just the surface ending.

Vowel-dropping versus vowel-shortening and v-stems

Several alternations can occur in the same high-frequency environments. Kéz–kezet shortens é; it does not delete an internal vowel. Kő–követ shortens ő and introduces v. Bokor–bokrot deletes an unstressed internal o. The accusatives all end in a linking-vowel-plus-t sequence, but their stems are structurally different.

Megmostam a kezem, aztán letettem a követ az asztalra.

I washed my hand, then put the stone on the table.

Compare the segmentations kez-et, köv-et, and bokr-ot. The companion v-stem page covers forms such as kő–köv-. Mixing these classes produces unattested forms such as kőt for ordinary object követ or bokorvat for bokrot.

Focus and register do not license variants

Contrastive focus preserves the required stem form. Moving a bokrot before the verb emphasizes the object; it does not restore the deleted vowel.

A bokrot ültetjük át, nem a rózsát.

We're replanting the bush, not the rose.

The standard alternants occur in both careful (formal) prose and everyday (informal) speech. Administrative kérelem–kérelmet may be formal because of its meaning, but its deletion is not a formal variant. Casual kérelemet remains nonstandard. Poets may manipulate word shapes or use older forms (literary/archaic), but those marked choices do not replace modern principal parts.

A kérelmet a határidő lejárta előtt kell benyújtani.

The application must be submitted before the deadline expires. (formal)

A decision tree

Does the dictionary form end in a or e? With the ordinary case, plural, possessive, and comparison suffixes treated here, lengthen it to á/é: alma–almát, lecke–leckét. First exclude formations such as adjectival -i and compound-like -féle, which preserve the short vowel in apai and lencseféle.
Is the final vowel already long, as in kávé or autó? Retain it: kávét, autót.
Is the word known to have a reduced principal part? Use it in the licensed environment: bokrot, tükrök, dolgom.
Is the suffix consonant-initial, such as -ban/-ben or -nak/-nek? A vowel-dropping noun normally keeps the full stem: bokorban, tükörnek.
Does the word instead shorten a long vowel or add v? Use its own class: kezet, követ.
Is the form unfamiliar? Check nominative, accusative, plural, and possessive principal parts; do not infer class solely from the nearest written vowel.

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Identify the change before choosing the suffix: deletion, final-vowel lengthening, shortening, and v-extension are separate lexical or productive operations.

Diagnostic exercise

Choose the standard form.

“the bush” as object: bokorot / bokrot
“in the bush”: bokrban / bokorban
“the motor” as object: motrot / motort
“the lesson” as object: lecket / leckét
“the coffee” as object: kávét / kávéét

Answers: (1) bokrot uses reduced bokr- with back -ot. (2) bokorban retains the full stem before consonant-initial -ban. (3) motort comes from stable motor-, not by analogy with bokor. (4) leckét lengthens final e to é. (5) kávét retains the already long final é and adds -t; no additional vowel is inserted.

Common Mistakes

❌ A motorot elvitte a szerelő.

Incorrect: stable motor takes accusative -t directly.

✅ A motort elvitte a szerelő.

The mechanic took the motor away.

❌ A bokorot ősszel visszavágjuk.

Incorrect: bokor selects reduced bokr- in the accusative.

✅ A bokrot ősszel visszavágjuk.

We cut the bush back in autumn.

❌ A kulcsot a tükr mellett találtam.

Incorrect: the reduced stem is not used as a free form before the postposition mellett.

✅ A kulcsot a tükör mellett találtam.

I found the key beside the mirror.

❌ Megittam a kavét, mielőtt elindultam.

Incorrect: kávé contains long á as well as long é; accents are lexical.

✅ Megittam a kávét, mielőtt elindultam.

I drank the coffee before I left.

❌ A kabátot a szobaban hagytam.

Incorrect: final a of szoba lengthens before -ban.

✅ A kabátot a szobában hagytam.

I left the coat in the room.

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Information structure can move a form, and register can change the vocabulary around it, but neither changes its stem allomorph. Morphological environment and lexical class do.

Key Takeaways

Vowel deletion, vowel shortening, v-extension, and final-vowel lengthening are separate processes.
Similar dictionary forms may belong to different classes: compare bokor–bokrot with motor–motort.
Consonant-initial cases usually retain the full form of vowel-dropping stems, as in bokorban.
Focus and register do not license nonstandard stem variants.

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