不言 is read as ふげん (fugen) and means silence.
ふげん
fugen
げんこうふいっち
inconsistency between one's words and actions
ふじゅうぶん
insufficient
まずい
ugly
ふめい
unknown
ふあん
anxiety
ふせい
injustice
ふそく
dissatisfaction
ふさく
low quality (e.g. of literary works)
ふほんい
reluctant
ぶきみ
weird
ふつう
suspension
ふふく