QUIETEN Meaning of QUIETEN in English ˈkwīə̇tən, -ə̇t ə n verb( quietened ; quietened ; quietening -t( ə )niŋ ; quietens )Etymology: quiet (II) + -en chiefly Britain : quietSynonyms: see calm Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012