Antonyms of adj compos_mentis

1 sense of compos mentis

Sense 1
compos mentis (predicate), of sound mind (predicate) -- (of sound mind, memory, and understanding; in law, competent to go to trial)

INDIRECT (VIA sane) -> insane -- (afflicted with or characteristic of mental derangement; "was declared insane"; "insane laughter")

Similarity of adj compos_mentis

1 sense of compos mentis

Sense 1
compos mentis (predicate), of sound mind (predicate) -- (of sound mind, memory, and understanding; in law, competent to go to trial)
       => sane (vs. insane) -- (mentally healthy; free from mental disorder; "appears to be completely sane")