[にんい, nin'i] (adj-na, adj-no) any; arbitrary; optional; discretion; non-specific; unspecified; free will; (P) #4347
[opushonaru] (n) optional
[opushonarutsua-] (n) optional tour
[opushonarupa-tsu] (n) optional parts
[きほんりょうきん, kihonryoukin] (n) basic rate (i.e. excluding optional service fees, usage charges, etc.); basic charge; base cost; base price; (P)
[こゆうせんたくじく, koyuusentakujiku] (n) { comp } inherently optional token
[ずいい, zuii] (adj-na, n) voluntary; optional; (P)
[ずいいてき, zuiiteki] (adj-na) voluntary; optional
[せんたくてき, sentakuteki] (adj-na) selective; optional; alternative
[にんいしんごう, nin'ishingou] (n) { comp } optional
[にんいせんたくこうせいようそ, nin'isentakukouseiyouso] (n) { comp } optional (O) component
[にんいせんたくりようしゃファシリティ, nin'isentakuriyousha fashiritei] (n) { comp } optional user facilities
[ふていファイル, futei fairu] (n) { comp } optional file
[ぶんみゃくじょうのせんたくじく, bunmyakujounosentakujiku] (n) { comp } contextually optional token
[ぶんみゃくじょうのせんたくようそ, bunmyakujounosentakuyouso] (n) { comp } contextually optional element
[ほじょご, hojogo] (n) { comp } optional word
[ようひ, youhi] (adj-no) necessary or not; optional (items)