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

鈎虫[kouchuu] hookworm
鈎鼻[kagibana] hooked nose
毛鈎[kebari] (fishing) fly
鈎爪[kagizume] claw

鈎股弦の定理[koukogennoteiri] Pythagorean theorem
鈎股弦[koukogen] three sides of right triangle (minor cathetus, major cathetus & hypotenuse)
引目鈎鼻[hikimekagihana] style of drawing the human face, popular in the Heian period