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

文蛤[hamaguri] common orient clam (Meretrix lusoria)
馬蛤貝[mategai] razor clam
蛤仔[asari] Manila clam (Ruditapes philippinarum)

蛤御門の変[hamagurigomonnohen] Hamaguri Gomon incident (1864 clash between pro and anti-shogunate forces)
支那蛤[shinahamaguri] Meretrix petechialis (species of hard clam)