Nouns are inflected for number (singular vs. plural) and definiteness, and are classified into two grammatical genders. Only pronouns inflect for case, and the previous genitive case has become an enclitic. A distinctive feature of the Nordic languages, including Danish, is that the definite articles, which also mark noun gender, have developed into suffixes. Typical of Germanic language plurals are either irregular or "strong" stems inflected through umlaut (i.e. changing the vowel of the stem (e.g. "fod/fødder" "foot/feet", "mand/mænd" "man/men") or "weak" stems inflected through affixation (e.g. "skib/skibe" "ship/ships", "kvinde/kvinder" "woman/women").