Insane


[in-seyn] /ɪnˈseɪn/

adjective
1.
not sane; not of sound mind; mentally deranged.
2.
of, relating to, or characteristic of a person who is mentally deranged:
insane actions; an insane asylum.
3.
utterly senseless:
an insane plan.
/ɪnˈseɪn/
adjective
1.

2.
characteristic of a person of unsound mind: an insane stare
3.
irresponsible; very foolish; stupid
adj.

1550s, from Latin insanus “mad, insane; outrageous, excessive, extravagant,” from in- “not” (see in- (1)) + sanus “well, healthy, sane” (see sane). Originally only of persons; of actions, from 1842. Cf. lunatic; and Italian pazzo “insane,” originally a euphemism, from Latin patiens “suffering.” German verrückt, literally past participle of verrücken “to displace,” “applied to the brain as to a clock that is ‘out of order’ ” [Buck]. The noun meaning “insane person” is attested from 1786.

insane in·sane (ĭn-sān’)
adj.
Of, exhibiting, or afflicted with insanity.

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