不ふ言げん不ふ語ごふげんふごMeanings1nounsilence; not saying a wordyojijukugo (four-character idiom)A yojijukugo meaning complete silence, refraining from speech. Often used in literary or formal contexts.会かい議ぎ中ちゅう、彼かれは不ふ言げん不ふ語ごを貫つらぬいた。During the meeting, he maintained complete silence.