安危[anki] fate
危うい[ayaui] dangerous
危うく[ayauku] barely
危ない[abunai] dangerous
危ながる[abunagaru] to be afraid of

危なっかしい[abunakkashii] dangerous
危ぶむ[ayabumu] to fear
危める[ayameru] to wound
危絵[abunae] suggestive or indecent picture
危害[kigai] injury

困らせる[komaraseru] to trouble with questions
困り果てる[komarihateru] to be greatly perplexed
困り者[komarimono] good-for-nothing
困り切る[komarikiru] to be greatly perplexed
困る[komaru] to be troubled

困窮[konkyuu] poverty
困苦[konku] privation
困難[konnan] difficulty
困惑[konwaku] bewilderment
困憊[konpai] exhaustion