よ 善くもまあ LinksSentence search for 善くもまあSentence search for よくもまあKanji details for 善Edit in JMdict Adverb (fukushi)1. just how; how (dare you)Usually written using kana alone, emphaticよくもまあ、そんなふるま振舞いができるもんだ。How dare you behave like that! Discussions Log in to talk about this word.