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

虞美人草[gubijinsou] field poppy
不虞[fugu] emergency
危虞[kigu] apprehensions
失敗の虞[shippainoosore] risk of failure

憂虞[yuugu] anxiety
虞犯少年[guhanshounen] juvenile likely to commit a crime
虞犯[guhan] likelihood of committing a crime