Definition of quietener in English:

quietener

(also quietner)

noun

  • A substance that quiets or soothes; a sedative or narcotic drug.

Origin

Mid 19th century; earliest use found in The Times. From quieten + -er.

Pronunciation

quietener

/ˈkwʌɪətnə//ˈkwʌɪət(ə)nə/