irrational
word
Definition
When something is irrational, it does not make sense or is not based on reason or logic. It often describes actions, thoughts, or feelings that are not reasonable.
Usage & Nuances
Often used in formal or academic contexts, but common in everyday speech too. Describes thoughts, fears, or decisions that lack logic. Common combinations: 'irrational fear', 'irrational decision'. Do not use for mathematical 'irrational numbers'—this is a different meaning.
Example Sentences
Her reaction seemed completely irrational to everyone.
basic
He made an irrational decision without thinking it through.
natural
Stop being irrational—there's no reason to panic.
natural
Sometimes, our minds have irrational worries that we can't control.
natural
His irrational fear of dogs makes it hard to walk in the park.
basic
It's irrational to be afraid of the dark when you know there's nothing there.
basic