口を切る くちをきる Also written 口をきる Meanings Expression, Godan verb to be the first to speak; to break the silence to open something for the first time; to broach (e.g. a cask); to break a seal; to break open Kanji 口 mouth. Read as くち. 切 cut. Read as きる. Word lists Idioms Jinuma: Japanese Dictionary · Word lists