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