INSANE

insane

(adjective) afflicted with or characteristic of mental derangement; “was declared insane”; “insane laughter”

harebrained, insane, mad

(adjective) very foolish; “harebrained ideas”; “took insane risks behind the wheel”; “a completely mad scheme to build a bridge between two mountains”

Source: WordNet® 3.1

Etymology

Adjective

insane (comparative more insane or insaner, superlative most insane or insanest)

Exhibiting unsoundness or disorder of mind; not sane; mad

Synonyms: delirious, distracted

Used by, or appropriated to, insane persons

Causing insanity or madness.

Characterized by insanity or the utmost folly; ridiculous; impractical

Synonyms

• See also insane

Antonyms

• sane

Anagrams

• Annies, Sannie, Sienna, inanes, nenias, sannie, sienna

Source: Wiktionary

In*sane", a. Etym: [L. insanus. See In- not, and Sane.]

1. Exhibiting unsoundness or disorded of mind; not sane; mad; deranged in mind; delirious; distracted. See Insanity, 2.

2. Used by, or appropriated to, insane persons; as, an insane hospital.

3. Causing insanity or madness. [R.] Or have we eaten on the insaneroot That takes the reason prisoner Shak.

4. Characterized by insanity or the utmost folly; chimerical; unpractical; as, an insane plan, attempt, etc. I know not which was the insane measure. Southey.

Source: Webster’s Unabridged Dictionary 1913 Edition