| Adv. | 1. | unbelievably - not easy to believe; "behind you the coastal hills plunge to the incredibly blue sea backed by the Turkish mountains" Antonyms: believably - in a believable manner; "he acted believably sincere" |
| 2. | unbelievably - in an unbelievable manner; "he was unbelievably angry" Antonyms: believably - in a believable manner; "he acted believably sincere" |