verb (used with or without object), tran·quil·ized, tran·quil·iz·ing.
Related formstran·quil·i·za·tion, nounun·tran·quil·ize, verb (used with object), un·tran·quil·ized, un·tran·quil·iz·ing.
Examples from the Web for tranquillize
It is shaped and set to stand and abide where men consort, to unify their minds, and tranquillize their strifes.Abraham Lincoln's Cardinal Traits;|Clark S. Beardslee
Her presence never failed to soothe, tranquillize, and encourage him.The Delafield Affair|Florence Finch Kelly
"Be calm, tranquillize yourself—it will all be well," said the latter, with a smile.The Daughter of an Empress|Louise Muhlbach
Rather say, madam, that there is always one star above which can tranquillize and control them.Imaginary Conversations and Poems|Walter Savage Landor
Your voice, your looks, will soothe and tranquillize her, should she awaken from her long insensibility.Emmeline|Charlotte Turner Smith