necessity (quality or state of being necessary, unavoidable, or absolutely requisite)

unnecessary

needlessness

sort, kind, type

kind, sort, type, class, genus, order, family / similar example, parallel

kind, sort, type, the like / a similar thing, parallel / (taxonomy) a conventional grouping that corresponds to a class or an order / (logic) Short for 類概念 (ruigainen).

representing relationship to a family

house of something, place where some business is conducted / person who does that thing

a house

a house / one's house