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Irrational (Adjective)

Real but not expressible as the quotient of two integers; "irrational numbers".

Relational adjectives (pertainyms).

Pi is an irrational number, which means its decimal representation goes on forever without repeating.
The mathematician struggled to understand the properties of the newly discovered irrational function.
She found that the square root of 2 is an irrational number, which is a fundamental concept in geometry.
Irrational numbers, such as e and phi, play a crucial role in advanced mathematical theories.
Many people mistakenly believe that all numbers are rational, but there are infinite irrational numbers.

Not consistent with or using reason; "irrational fears"; "irrational animals".

All adjective clusters.

Panic buying is often an irrational response to natural disasters or economic downturns.
Her irrational fear of spiders made it difficult for her to participate in the science project.
The company's irrational decision to invest in a declining market ultimately led to its bankruptcy.
He is often accused of making irrational arguments in favor of conspiracy theories.
Her irrational attachment to material possessions was a source of conflict with her minimalist friends.