Class IV (conjugarea a patra) is the group whose infinitive ends in -i or -î. Most of it is the familiar -i type (a dormi, a citi) covered elsewhere. This page is about the much smaller -î subtype: a handful of verbs whose infinitive ends in the sound spelled î — a coborî (to descend), a omorî (to kill), a doborî (to knock down), a hotărî (to decide), a urî (to hate), a tăbărî (to set upon). The group is tiny, but it is responsible for a wildly disproportionate share of spelling mistakes, because it is the one place where two separate Romanian difficulties — the î/â orthographic rule and the optional -ăsc infix — bite at exactly the same time. Master these six verbs and you have closed one of the most persistent leaks in intermediate Romanian writing.
Two patterns hide in one ending
Before any endings, you have to know that -î verbs split into two behavioural types, just like the -i verbs do:
- A plain type that adds endings directly to the stem: a coborî → cobor, cobori, coboară…
- An -ăsc type that inserts the infix -ăsc-/-ăști-/-ăște- in the singular and 3pl: a hotărî → hotărăsc, hotărăști, hotărăște…
The infix here is -ăsc- (back vowel ă), not the -esc- you see in a citi → citesc. That is no accident: -î is a back vowel, so it pulls the infix to its back-vowel variant. (See the -esc / -ăsc infix for the full distribution.)
The orthographic rule that governs everything here
Romanian writes the same central vowel /ɨ/ two ways:
- î at the start or end of a word, and across a prefix boundary in compounds (început, coborî, neînțeles, reîncepe).
- â inside a word (român, cuvânt, coborâm).
The infinitive a coborî ends in the word, so it is spelled î. But the moment you add an ending — -âm, -âți — that vowel is no longer final; it sits inside the word, so it must be written â: coborâm, coborâți. This single fact, that the spelling of the stem vowel flips from î to â the instant an ending lands on top of it, is the heart of the -î class.
Model verb (plain): a coborî — to descend, to get off
Drop the infinitive -î to find the stem cobor-, then attach the plain Class IV endings. Watch the vowel: it surfaces as â in the noi and voi forms, where it is now medial.
| Person | Form | Meaning |
|---|---|---|
| eu | cobor | I descend / I get off |
| tu | cobori | you descend |
| el / ea | coboară | he / she descends |
| noi | coborâm | we descend |
| voi | coborâți | you (pl.) descend |
| ei / ele | coboară | they descend |
Note two stem effects beyond the spelling: the eu form is the bare stem cobor (no ending, as everywhere in the present singular here), and the 3sg/3pl form shows the regular Class IV diphthongization o → oa under stress, giving coboară. The 3sg and 3pl are identical, as they so often are in Romanian.
Cobor la stația următoare, mă scuzați.
I'm getting off at the next stop, excuse me.
Cobori cu mine sau mergi mai departe?
Are you getting off with me, or going on further?
Coborâm pe scări, liftul iar e stricat.
We're taking the stairs down — the lift is broken again.
Prețurile coboară din nou înainte de sărbători.
Prices are dropping again before the holidays.
Model verb (-ăsc type): a hotărî — to decide
A hotărî is the verb everyone trips over, because it manages to use the -ăsc- infix and the î/â spelling shift in a single paradigm. The infix appears in the three singular persons and in 3pl; the noi and voi forms instead show the bare stem with the medial-â spelling.
| Person | Form | Meaning |
|---|---|---|
| eu | hotărăsc | I decide |
| tu | hotărăști | you decide |
| el / ea | hotărăște | he / she decides |
| noi | hotărâm | we decide |
| voi | hotărâți | you (pl.) decide |
| ei / ele | hotărăsc | they decide |
So in one verb you get both spellings of the central vowel: hotăr*ăsc uses ă* (a genuinely different vowel, the schwa) in the infix, while *hotărâ*m uses â (the /ɨ/ vowel) in the stem. They are not interchangeable. The infix carries ă; the stem vowel of the noi/voi forms is the original î now written â.
Eu hotărăsc unde mergem în vacanță, ca de obicei.
I decide where we go on holiday, as usual.
Voi hotărâți, eu vă susțin orice alegeți.
You all decide; I'll back you whatever you choose.
Hotărăște tu, mie chiar mi-e indiferent.
You decide — I genuinely don't mind.
A second example pair: a urî — to hate
A urî belongs to the -ăsc type, like a hotărî: the eu, tu, 3sg and 3pl carry the infix, while noi/voi show the bare stem with the medial-â spelling. Its forms are below.
| Person | Form | Meaning |
|---|---|---|
| eu | urăsc | I hate |
| tu | urăști | you hate |
| el / ea | urăște | he / she hates |
| noi | urâm | we hate |
| voi | urâți | you (pl.) hate |
| ei / ele | urăsc | they hate |
The point this verb makes is the same as a hotărî: the singular and 3pl carry the -ăsc- infix (urăsc, urăști, urăște), while noi/voi show the stem with medial â (urâm, urâți). The two vowels ă and â live side by side and must not be swapped.
Urăsc să aștept la coadă, dar nu am încotro.
I hate waiting in line, but I've no choice.
De ce ne urâm pentru un fleac ca ăsta?
Why are we hating each other over a trifle like this?
O urăște pentru că i-a luat locul.
He hates her because she took his job.
Why this small group punishes learners
Most Romanian spelling questions involve only the î/â choice, and most conjugation questions involve only the infix. The -î class is the rare spot where you must resolve both at once, in the same word, in opposite directions: pick ă for the infix vowel, â for the medial stem vowel, and remember that the dictionary headword still shows î because that vowel is word-final in the infinitive. There is no clever shortcut — the group is small enough that the honest advice is to memorise the six common members and their eu forms outright.
Common Mistakes
❌ Noi coborîm la metrou.
Incorrect — the central vowel is now medial, so it must be spelled â: coborâm. Medial î is a spelling error.
✅ Noi coborâm la metrou.
We get off at the metro.
❌ Eu hotărâsc azi.
Incorrect — the infix vowel is ă (schwa), not â: hotărăsc. The â belongs only to the noi/voi stem.
✅ Eu hotărăsc azi.
I'll decide today.
❌ Voi hotărăți unde mergem.
Incorrect — the noi/voi forms drop the infix and keep the medial-â stem: hotărâți, not hotărăți.
✅ Voi hotărâți unde mergem.
You all decide where we go.
❌ El coboresc din tren.
Incorrect — a coborî is plain, with no infix at all: el coboară.
✅ El coboară din tren.
He's getting off the train.
❌ Te uresc. / Te urâsc.
Incorrect — the eu form is urăsc (ă infix). Neither *uresc nor *urâsc exists.
✅ Te urăsc.
I hate you.
Key Takeaways
- The -î subtype of Class IV has two behaviours: plain (a coborî → cobor) and -ăsc (a hotărî → hotărăsc, a urî → urăsc). Learn each verb's eu form.
- The infix is -ăsc- (back vowel), matching the back vowel of -î, not -esc-.
- The stem vowel is the same /ɨ/ throughout; it is spelled î word-finally (in the infinitive) and â medially (once an ending follows): coborî → coborâm.
- The trap is keeping ă (infix) and â (medial stem) straight inside the very same verb: hotăr*ăsc* but *hotărâ*m.
- Writing a medial î (coborîm) is incorrect under post-1993 orthography.
Now practice Romanian
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Start learning Romanian→Related Topics
- Class IV Present: Plain -i VerbsA2 — How to conjugate the closed set of common Class IV (-i) verbs that take no -esc infix, including a dormi, a veni, and a simți, with their o → oa diphthongization.
- Class IV Present: -esc VerbsA2 — How to conjugate the dominant Class IV subtype that inserts -esc (or back-vowel -ăsc) in the singular and third-person plural — the single most common present-tense pattern in Romanian.
- The -esc / -ăsc Infix (Class IV)A2 — The productive -esc/-ăsc infix that appears in most Class IV verbs — where it sits in the paradigm, why it drops in 'we' and 'you-plural', and why you should expect it by default.
- The Present Indicative: OverviewA1 — An introduction to the Romanian present indicative — the workhorse tense that covers both 'I work' and 'I am working' and even the near future.
- Class IV Present: Stem Changes (o→oa, e→ie, a→ă)B1 — How Class IV (-i / -î) verbs diphthongize their stem under third-person stress — o→oa in a dormi and a coborî, e→ie elsewhere — and why the very common -esc verbs never do.