insane

/ษชnหˆseษชn/

IPA: /IH0 N S EY1 N/

adjective
  1. 1

    Exhibiting unsoundness or disorder of mind; not sane; mad

  2. 2

    Used by, or appropriated to, insane persons

    โ€œan insane asylumโ€

  3. 3

    Causing insanity or madness.

  4. 4

    Characterized by insanity or the utmost folly; ridiculous; impractical

    โ€œan insane amount of moneyโ€

Antonyms

Source: https://en.wiktionary.org/wiki/insane