Not having a function or failing to perform its intended purpose; nonfunctional.
From prefix 'a-' (without) plus 'functional' (from Latin 'functio'). Typically used in psychology, medicine, and technology to describe things that don't work as intended.
In psychology, 'afunctional behavior' describes actions that don't help you survive or adapt—it's how therapists talk about depression or anxiety that holds people back.
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