口を酸っぱくする くちをすっぱくする Also written 口をすっぱくする Meanings Expression, する verb to repeatedly admonish; to tell over and over (usu. as 口を酸っぱくして言う) Kanji 口 mouth. Read as くち. 酸 acid. Read as すい. Word lists Idioms Jinuma: Japanese Dictionary · Word lists