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

元寇[genkou] the Mongol Invasion
倭寇[wakou] Japanese pirates (of the Middle Ages)
入寇[nyuukou] invasion

司寇[shikou] Minister of Justice (Zhou-dynasty China)
寇する[atasuru] to harm
寇する[kousuru] to invade