reasonless

Definitions of reasonless
1

adj not marked by the use of reason

reasonless hostility”
Synonyms:
mindless, senseless
unreasonable
not reasonable; not showing good judgment

adj having no justifying cause or reason

“an apparently arbitrary and reasonless change”
Synonyms:
causeless
unmotivated
without motivation

adj not endowed with the capacity to reason

“a reasonless brute”
Synonyms:
irrational
not consistent with or using reason

Sign up, it's free!

Whether you're a student, an educator, or a lifelong learner, Vocabulary.com can put you on the path to systematic vocabulary improvement.