adjective Etymology: Middle English ~l, from Latin ~lus Date: 15th century 1. free from agitation of mind or spirit , free from disturbance or turmoil , unvarying in aspect ; steady , stable , see: calm ~ly adverb ~ness noun
TRANQUIL
Meaning of TRANQUIL in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012