杳 ⇒
杳无音讯 杳无音信 yǎowúyīnxìn, [杳無音信], to have no news whatever
杳 yǎo, dark and quiet/disappear
渺 ⇒
渺小 miǎoxiǎo, minute/tiny/negligible/insignificant
渺茫 miǎománg, uncertain/remote/distant and indistinct/vague
渺 miǎo, (of an expanse of water) vast/distant and indistinct/tiny or insignificant
飘渺 piāomiǎo, [飄渺], faintly discernible/as in a mist
虚无飘渺 渺无人烟 miǎowúrényān, [渺無人煙], remote and uninhabited (idiom); deserted/God-forsaken
浩渺 hàomiǎo, vast/extending into the distance