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

一本橋[ipponbashi] (a) log bridge
仮橋[karibashi] temporary bridge
可動橋[kadoukyou] movable bridge
艦橋[kankyou] bridge (e.g. on a warship)
丸木橋[marukibashi] log bridge

橋脚[kyoukyaku] bridge pier
橋脚舟[kyoukyakushuu] pontoon
橋渡し[hashiwatashi] bridge building
橋頭保[kyoutouhou] bridgehead