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

幾つも[ikutsumo] many
越幾斯[ekisu] extract (esp. of food, fruit, etc.)
沃度丁幾[youdochinki] tincture of iodine
位相幾何学[isoukikagaku] topology
幾つ[ikutsu] how many?

幾つか[ikutsuka] (a) few
幾ら[ikura] how much?
幾らか[ikuraka] some
幾何[kika] geometry