What context can I use each word in?
Learn when and how to use these words with these examples!
irrational
Example
Her fear of flying is irrational since it is statistically safer than driving. [irrational: adjective]
Example
He acted irrationally when he quit his job without having another one lined up. [irrationally: adverb]
unreasonable
Example
It's unreasonable to expect someone to work 80 hours a week without overtime pay. [unreasonable: adjective]
Example
She was being unreasonable when she refused to listen to his explanation. [unreasonably: adverb]
Good things to know
Which word is more common?
Unreasonable is more commonly used than irrational in everyday language. Unreasonable covers a wider range of contexts and can be used to describe behavior, demands, or decisions that lack sound judgment. Irrational is less common and is more likely to be used in psychological or philosophical discussions.
What’s the difference in the tone of formality between irrational and unreasonable?
Both irrational and unreasonable can be used in formal and informal contexts. However, irrational may be seen as more technical or specialized, while unreasonable is more versatile and can be used in various formality levels.
