noun
silence; not speaking
Literary or formal term for silence or refraining from speech. Often appears in fixed expressions like 不言実行 (acting without speaking) or 不言のうちに (in silence).
彼は不言実行の人だ。
He is a man of action, not words.
会議中、彼は終始不言を貫いた。
During the meeting, he remained silent the whole time.