Mixed and Foreign Feminine Nouns

The four feminine paradigms — žena, růže, píseň, kost — cover the overwhelming majority of feminine nouns, but a handful of important groups sit at the seams: foreign nouns ending in -ie (biologie, Anglie), the genuinely irregular idea, the productive person-forming suffixes -ka and -kyně, and a few indeclinables like paní. None of these is a fifth paradigm; each is a tilt on one you already know. This page shows where each group anchors and exactly which cells misbehave, so you are not caught out by the everyday words — v Anglii, o té studentce, ta paní — that hide in these corners.

The -ka person nouns: žena with a k→c twist

This is the most important group on the page because it is fully productive: Czech makes a feminine counterpart to almost any masculine person noun by adding -ka (or -yně, below). Student → studentka, učitel → učitelka, kamarád → kamarádka, Čech → Češka, soused → sousedka. These are not exotic at all — they decline as ordinary žena nouns. The only thing to watch is the k → c alternation that the dative/locative singular -e triggers, exactly as in matka → matce.

The dative/locative studentce, kamarádce is the cell to drill, because it is where the surface form stops looking like the dictionary word. And the genitive plural needs the fill vowel — studentek, kamarádek — for the same cluster-breaking reason as matka → matek.

The -kyně and -yně nouns: růže territory

Czech also forms feminine persons with -kyně / -yně: přítel → přítelkyně (female friend), kolega → kolegyně (female colleague), žák → žákyně (female pupil), průvodce → průvodkyně (female guide). Because these end in the soft -ě, they anchor on růže, not žena — soft -i where the -ka nouns take hard endings.

Note the contrast worth holding in mind: studentku (hard -u, žena) but přítelkyni (soft -i, růže). The suffix is your signal — -ka → žena, -yně → růže.

Foreign -ie nouns: růže with a long í

A huge group of internationalisms enters Czech as feminines in -ie: the sciences and disciplines (biologie, filozofie, geografie), abstractions (demokracie, energie, funkce-adjacent), and many country names (Anglie, Itálie, Francie, Austrálie). They decline on the růže pattern, but with a characteristic stretch of the vowel to -í in several cells, because the stem already carries an -i-. The cell you will use most is the locative singular -ii, after v (in a country, in a field of study).

The locative and dative collapse onto -ii (two i's, the stem -i- plus the růže ending -i), and the instrumental lengthens to -ií. The double -ii in v Anglii and o biologii looks odd to an English eye but is completely regular — and dropping one i (*v Anglí, *v Angli) is a real and frequent error.

Idea: the one genuinely irregular feminine

idea ("idea") is the page's true outlier. It looks like a žena noun (ends in -a) but declines on a mixed hard–soft pattern, because its stem is really ide- with a soft glide. The standard forms are worth memorising as a one-off, since idea is a common word and over-regularising it (*idey, *ideě) is a classic mistake:

So idea keeps the žena-style accusative -u (ideu) and instrumental -ou (ideou), but takes soft -je/-ji in the genitive, dative and locative. A small set of learned words behaves the same way (orchidea → orchideje). When in doubt, check the dictionary — this is exactly the kind of word Czechs themselves look up.

Indeclinables: paní and friends

A few feminines do not decline at all in the singular. The most important is paní ("lady, Mrs, ma'am"), which keeps the form paní through every singular case — té paní, s paní, o paní — and only inflects in the plural (paní in most cases, paními in the instrumental). Many borrowed names and words ending in a stressed foreign vowel are likewise indeclinable: Niké, menu (neuter), taxi (neuter). For the wider class see indeclinable nouns.

Common mistakes

The thread is over-regularisation: an English speaker, having learned the four clean paradigms, applies them too eagerly — forcing žena onto přítelkyně, dropping the double i of Anglie, or trying to inflect the indeclinable paní. The defence is to recognise the suffix or origin first: -ka → žena (with k→c), -yně → růže, -ie → růže-with-double-i, idea → look it up, paní → leave it alone.

Key takeaways

• These are not new paradigms — each foreign or derived group tilts toward žena or růže.
• -ka person nouns (studentka, kamarádka, učitelka) follow žena with the k → c dative/locative softening (studentce) and a fill-vowel genitive plural (studentek).
• -yně/-kyně nouns (přítelkyně, kolegyně) follow růže: soft -i (přítelkyni).
• Foreign -ie nouns (biologie, demokracie, Anglie) follow růže but spell the dat/acc/loc singular with a double -ii (v Anglii, o biologii).
• idea is genuinely irregular (gen ideje, acc ideu, instr ideou) — memorise it.
• paní is indeclinable in the singular — it never changes form.