誰何 すいか Meanings Noun, する verb, Transitive challenging (an unknown person); asking a person's identity Kanji 誰 who. Read as スイ. 何 what. Read as カ. Example sentences いきなり本人に誰何するのも無粋と考えました。I thought it would be boorish to challenge his identity without warning. Jinuma: Japanese Dictionary · Word lists