Feminine plurals are the part of the Romanian noun system that takes the longest to internalize, and for a good reason: two things change at once. First, the ending splits — some feminines take -e (casă → case) and others take -i (ușă → uși), with no single clean rule for which. Second, the root vowel very often shifts at the same time: a → e (masă → mese), oa → o (poartă → porți), a → ă (carte → cărți). So forming a feminine plural means making both decisions — pick the ending and shift the vowel — and getting either one wrong produces a wrong word. There is a large payoff for mastering this, though: the feminine plural stem is exactly what the genitive-dative singular is built on, so the work you do here is reused immediately in the case system.
Group 1: -ă nouns → -e (often with a→e)
The largest group of feminines ends in -ă in the singular. Many of these take -e in the plural, and when they do, an a in the stem frequently shifts to e.
| Singular | Plural | Vowel shift | Meaning |
|---|---|---|---|
| casă | case | none | houses |
| fată | fete | a → e | girls |
| masă | mese | a → e | tables |
| fereastră | ferestre | ea → e | windows |
Note casă → case: the stem a stays put here, while in masă → mese an identical-looking a shifts to e. There is no clean synchronic rule that separates the two — the a→e shift is partly lexicalized, firing in some stems and not in others. The reliable takeaway is to learn the plural as a unit rather than trying to predict every shift, but to expect a vowel change and check for it.
Pe mese erau pahare goale și scrumiere pline.
On the tables there were empty glasses and full ashtrays. (masă → mese: a→e)
Fetele au plecat în excursie cu clasa la munte.
The girls went on a school trip to the mountains. (fată → fete: a→e)
Group 2: -ă nouns → -i (often with a→i or stem softening)
Other -ă nouns take -i instead. With these the -ă is replaced by -i, and the consonant before it may soften just as in the masculine.
| Singular | Plural | Change | Meaning |
|---|---|---|---|
| ușă | uși | ă → i (s reads soft already) | doors |
| gură | guri | ă → i | mouths |
| școală | școli | oa → o, ă → i | schools |
| poartă | porți | oa → o, t → ț | gates |
Toate ușile de la etaj erau încuiate când am ajuns.
All the doors upstairs were locked when I arrived. (ușă → uși)
Porțile cetății se deschideau o singură dată pe zi.
The fortress gates opened only once a day. (poartă → porți: oa→o, t→ț)
Group 3: -e nouns → -i (with a→ă, oa→o, ea→e)
Feminine nouns ending in -e in the singular (carte, floare, vale, noapte) almost all take -i in the plural, replacing the -e with -i. These are the ones with the most dramatic vowel shifts, because the high front -i pulls hard on the root.
| Singular (in -e) | Plural | Vowel shift | Meaning |
|---|---|---|---|
| carte | cărți | a → ă (+ t→ț) | books |
| floare | flori | oa → o | flowers |
| vale | văi | a → ă | valleys |
| noapte | nopți | oa → o (+ t→ț) | nights |
| parte | părți | a → ă (+ t→ț) | parts |
Cărțile de pe raftul de sus sunt toate prima ediție.
The books on the top shelf are all first editions. (carte → cărți: a→ă)
Florile de câmp se ofilesc repede în vază.
Wildflowers wilt quickly in a vase. (floare → flori: oa→o)
Nopțile de vară sunt scurte și calde aici.
Summer nights are short and warm here. (noapte → nopți: oa→o, t→ț)
Why the vowels shift: the same front-vowel pull
The vowel shifts are not arbitrary — they are the regular effect of the front endings -e and -i reaching back into the stressed syllable. A back or open vowel (a, oa) is pulled toward a closer or more central one: a → e (masă → mese), a → ă (carte → cărți), oa → o (floare → flori, poartă → porți). The oa → o shift is the most consistent of all — oa is a diphthong that only survives under stress before a back vowel; once the ending becomes front (-i or -e), the diphthong "monophthongizes" to plain o. Recognizing this lets you predict floare → flori and poartă → porți without memorizing them separately: any feminine with oa in the root will collapse it to o in the plural.
The big payoff: the plural feeds the genitive-dative
Here is why this page is worth the effort. The Romanian feminine genitive-dative singular ("of/to the X") is not built from the singular — it is built from the plural stem. You take the plural and add the singular article -i:
| Singular | Plural | Genitive-dative singular | Meaning of gen-dat |
|---|---|---|---|
| fată | fete | fetei | of/to the girl |
| casă | case | casei | of/to the house |
| carte | cărți | cărții | of/to the book |
| floare | flori | florii | of/to the flower |
So carte → cărți → cărții and floare → flori → florii — the shifted vowel from the plural rides straight into the case form. This is why a learner who can't form the feminine plural will also fail at the genitive-dative: the plural is the foundation of both. (The genitive-dative of feminine nouns page works through this dependency in full.)
Titlul cărții mi-a atras atenția imediat.
The book's title caught my attention immediately. (carte → cărți → cărții)
I-am dat florii puțină apă în fiecare dimineață.
I gave the flower a little water every morning. (floare → flori → florii, dative)
Source-language comparison
English speakers have no instinct for any of this: the English plural never touches the stem vowel (house → houses, not *heuses). The closest English parallels — foot → feet, goose → geese — are a tiny irregular set, whereas in Romanian the stem-vowel shift is the normal feminine behavior. Worse, the -e vs. -i split has no English analogue at all, so learners tend to default to whichever they heard last. The honest truth: there is no fully predictive rule for -e vs. -i, and you must learn the plural together with the noun. But the vowel shifts are predictable (especially oa→o), so memorize the ending and derive the vowel.
Văile dintre dealuri sunt acoperite de ceață dimineața.
The valleys between the hills are covered in fog in the morning. (vale → văi: a→ă)
Serile de toamnă se răcesc devreme.
Autumn evenings turn cold early. (seară → seri: ea→e)
Common Mistakes
Don't pick the wrong ending — carte is an -i plural, not -e:
❌ două carte / cărte
Incorrect — carte takes -i with a→ă: cărți.
✅ două cărți
two books
Don't skip the oa → o shift:
❌ multe floare / floari
Incorrect — the oa collapses to o: flori.
✅ multe flori
many flowers
Don't skip the a → e shift on -e plurals:
❌ două mase (meaning 'two tables')
Incorrect — the a shifts to e: mese. (masa with one s = 'the table')
✅ două mese
two tables
Don't forget the consonant softening that rides along with the vowel shift:
❌ multe poarte / poarți
Incorrect — oa→o and t→ț together: porți.
✅ multe porți
many gates
Don't build the genitive-dative from the singular instead of the plural:
❌ coperta cartei
Incorrect — the gen-dat rides the plural cărți: cărții, not *cartei.
✅ coperta cărții
the book's cover
Key Takeaways
- Feminine plurals split between -e and -i, and there is no fully reliable rule for which — learn the plural with the noun.
- A root-vowel shift usually fires at the same time: a→e (mese), a→ă (cărți), oa→o (flori, porți), ea→e (seri).
- The oa→o shift is the most consistent; expect it whenever the singular has oa.
- Consonant softening (t→ț) can ride along with the vowel shift (poartă→porți, noapte→nopți).
- The feminine genitive-dative singular is built on this plural stem (carte→cărți→cărții), so mastering the plural unlocks the case system too.
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Start learning Romanian→Related Topics
- Forming Plurals: OverviewA1 — Romanian forms plurals with a tiny set of endings — masculine -i, feminine -e or -i, neuter -uri or -e — but the hard part is the stem alternations those endings trigger (a→e, oa→o, d→z, t→ț). Adding the ending is only half the job; the stem change is the other half.
- Masculine Plurals (-i)A2 — Romanian masculine nouns form their plural with a single ending — -i — but that -i triggers palatalization of the final consonant (brad→brazi, perete→pereți, urs→urși), and the audible change is in the consonant, not the often-whispered final -i.
- Neuter Plurals (-uri, -e)A2 — Neuter nouns split between two plural endings — -uri (tren→trenuri, lucru→lucruri) and -e (scaun→scaune, oraș→orașe) — with no fully reliable rule, though -uri is the productive default for new loans and many monosyllables. Whichever ending wins, the neuter plural takes feminine adjective agreement.
- Genitive-Dative of Feminine NounsB1 — The feminine genitive-dative singular is built on the PLURAL stem, not the singular — fată→fete→fetei, carte→cărți→cărții — so you must know the plural before you can form it.
- The Definite Article: Feminine (-a, -ua)A1 — How the enclitic definite article attaches to feminine singular nouns — -ă nouns swap to -a (casă → casa), -e nouns add -a (floare → floarea), and stressed-vowel nouns take -ua (cafea → cafeaua) — and why 'a house' and 'the house' differ by only one vowel.