- unreasonably - not in a reasonable or intelligent manner; "she reacted unreasonably when she learned she had failed"
Antonyms: sanely, sensibly, reasonably
Derived from adjective unreasonable1
- unreasonably, immoderately - to a degree that exceeds the bounds or reason or moderation; "his prices are unreasonably high"
Antonyms: reasonably, moderately, within reason, somewhat, fairly, middling, passably
Derived from adjective unreasonable4