Genus
Except in some southern dialects, there is nothing in the form of most nouns that indicates their gender. A small number of nouns pairs for people, however, end in ' (m.) and ' (f.), as do adjectives when they are used as nouns: 'brother', 'sister', 'the rich one (m.)', 'the poor one (f.)'. Grammatical gender normally agrees with natural gender for people and animals; thus nouns such as 'father', 'son', and 'ox' are masculine, while nouns such as 'mother' and 'girl, daughter' are feminine. However, most names for animals do not specify biological gender.