verb
or tran·quil·lize ˈtraŋkwəˌlīz, -rank-, -raank-
( -ed/-ing/-s )
Etymology: tranquil + -ize
transitive verb
: to cause to be or become tranquil pacify
the perfect balance she had held … stirred and yet tranquilized him — Edith Wharton
specifically : to reduce or bring to a quiet or unagitated state by means of a chemical reaction
nicotinamide … also tranquilized animals — D.W.Woolley
intransitive verb
: to become tranquil
Synonyms: see calm