ようとして

杳として

utterly (unknown; esp. of someone's whereabouts); completely; (no information) whatsoever; at all

N3Expression
Expression, Adverb
utterly (unknown; esp. of someone's whereabouts)completely(no information) whatsoeverat all

Example Sentences

杳として行方(ゆくえ)が知れない。

Nothing whatever is known of him.