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

蒼茫[soubou] dusky
茫然[boozen] dumbfounded
茫然自失[bouzenjishitsu] stupor
茫漠[boubaku] boundless
往事渺茫[oujibyoubou] memories of the past events (being, becoming) far and distant

往事茫茫[oujiboubou] memories of the past events (being, becoming) far and distant
茫茫[boubou] wide expanse of flat surface (e.g. sea, plains)
草茫々[kusaboubou] covered with weeds
渺茫[byoubou] vast