だいし 大姉 LinksSentence search for 大姉Sentence search for だいしKanji details for 大 and 姉Edit in JMdict Noun, Noun, used as a suffix1. Sister (i.e. a nun; sometimes used as a posthumous suffix)Buddhism, Honorific or respectful (sonkeigo) language, See also 居士 Discussions Log in to talk about this word.