unbelievably

Adverbial unbelievably has 2 senses

• unbelievably(r = adv.all) implausibly, improbably, incredibly - not easy to believe; "behind you the coastal hills plunge to the incredibly blue sea backed by the Turkish mountains"
Antonym: believably

• unbelievably(r = adv.all) - in an unbelievable manner; "he was unbelievably angry"
Antonym: believably