Dictionary
tran•quil•ize
Pronunciation: (trang'kwu-līz"), [key]—
v.t., v.i., -ized, -iz•ing.
to make or become tranquil.
Also,tran'quil•lize"; esp. Brit.,tran'quil•lise".Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.