兇悍[kyoukan] heinousness
元兇[gankyou] ringleader
兇悪[kyouaku] atrocious
兇漢[kyoukan] villain
兇器[kyouki] dangerous weapon

兇具[kyougu] dangerous weapon
兇行[kyoukou] violence
兇手[kyoushu] assassin
兇状[kyoujou] crime

恐らく[osoraku] perhaps
恐れ[osore] fear
恐れ戦く[osoreononoku] to tremble with fear
恐れ入る[osoreiru] to be sorry
恐ろしい[osoroshii] terrible

恐喝[kyoukatsu] blackmail
恐慌[kyoukou] panic
恐妻家[kyousaika] hen-pecked husband
恐妻病[kyousaibyou] wife-phobia
恐縮[kyoushuku] feeling obliged