Wiktionary
unfathomably
adv. In an unfathomable manner; beyond understanding.
Usage examples of "unfathomably".
Hermine now gave me, a look full of amusement, full of irony and roguishness and fellow feeling, and at the same time so grave, so wise, so unfathomably serious.
Remarkable the look that Hermine now gave me, a look full of amusement, full of irony and roguishness and fellow feeling, and at the same time so grave, so wise, so unfathomably serious.
He came to in the ambulance and smiled encouragement at Doc Daneeka's weevil-like, glum and overshadowed countenance for the dizzy second or two he had before everything went rose-petal pink again and then turned really black and unfathomably still.