不悪[ashikarazu] don't get me wrong, but ...
意識不明[ishikifumei] unconscious
一心不乱[isshinfuran] wholeheartedly
一定不変[itteifuhen] invariable
運動不足[undoubusoku] insufficient exercise

栄養不足[eiyoubusoku] malnutrition
過不足[kafusoku] excess or deficiency
回復不可能[kaifukufukanou] non-recoverable
気不味い[kimazui] unpleasant
健康不安[kenkoufuan] poor health

軽輩[keihai] underling
後輩[kouhai] junior (at work, school, etc.)
若輩者[jakuhaisha] fledgling
先輩[senpai] senior (at work or school)
鼠輩[sohai] small fry

俗輩[zokuhai] worldlings
同年輩[dounenpai] persons of the same age
同年輩の人[dounenpainohito] contemporary
同輩[douhai] fellows
年輩[nenpai] elderly

不逞[futei] insubordination
逞しい[takumashii] burly
不逞の輩[futeinoyakara] lawless people

逞しくする[takumashikusuru] to give rein to
逞しゅうする[takumashuusuru] to give rein to