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insane

in·sane

insane

 
 
pronunciation:
ihn seIn
features:
Word Explorer, Word Parts
part of speech: adjective
definition 1: having a disabling mental disease; crazy; mad.
The person who committed this crime had to be insane.He began to have delusions and feared he was going insane.
synonyms:
crazy, demented, deranged, lunatic, mad
antonyms:
sane
similar words:
batty, berserk, cracked, crazed, daft, loco, loony, maniacal, manic, mental, nutty, psycho, schizoid, schizophrenic, touched, unbalanced, unsound
definition 2: typical of or associated with people who have such a disease.
an insane grin
synonyms:
crazy, demented, deranged, lunatic, mad
antonyms:
rational
similar words:
batty, buggy, crazed, cuckoo, daffy, daft, haywire, loony, maniacal, manic, mental, meshuga, nutty, schizoid, schizophrenic, screwy, unsound
definition 3: for, or used by, insane persons, as an institution.
The old hospital was turned into an insane asylum.
synonyms:
lunatic
similar words:
loony
definition 4: exceptionally foolish or senseless.
an insane scheme
synonyms:
crazy, daft, loony, mad, wacky, wild
antonyms:
sane
similar words:
absurd, balmy, batty, berserk, bizarre, crackpot, daffy, dumb, foolish, half-baked, harebrained, idiotic, loco, lunatic, maniacal, mental, nutty, ridiculous, screwy, senseless, unbalanced, unreasonable, unsound, zany
derivations: insanely (adv.), insaneness (n.)
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Word Parts
The word insane contains the following parts:
in-2 Latin prefix that means not, without
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The prefix in-2 occurs in Latin loanwords and attaches to Latinate bases. The bases of most words prefixed with in-2 are independent adjectives (inadvertent , incognizant ), although the base adjective may no longer be in widespread use (as with incessant ). Exceptions include iniquitous and indignant . -in2 has multiple forms, as the 'n' sound in in-2 assimilates to the initial sound of the base to which it is attached. See the assimilated forms ig-, il-2, im-2, and ir-2.
san Latin root that means health
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