© 2026 Sloth Lingo. Learn easy. Lounge wisely.

antirational

Upper-Intermediate (B2)

IPA: /ˌæn.tiˈræʃ.ən.əl/

KK: /æntiˈræʃənl/

adjective
Definition

Not based on reason or logical thinking; opposing rational thought.


Example

His antirational beliefs often led to conflicts with those who valued logic.


Conversation
Sloth A
Did you see that debate last night?
Sloth B
Yeah, it was pretty intense, but some points felt antirational to me.
Sloth A
I know what you mean; it seemed like they ignored facts completely.
Sloth B
Exactly! It’s frustrating when discussions turn so antirational.

Synonyms & Antonyms
Synonyms
irrational
illogical
unreasonable
Antonyms
rational
logical
reasonable
Root Explanation

Antirational is formed from "anti-" (meaning against) and "rational" (from Latin "rationalis", meaning reasonable or logical). The word describes a stance or belief that is against reason or logic.

Memory Tip

Think of being 'against' ('anti-') what is 'reasonable' or 'logical' ('rational'). This helps you remember that 'antirational' refers to something that opposes reason.

Visually Confused Words
unrational
tractional
nutational
notational
natational
irrational
birational
untraditional
Is this page helpful?