tran·quil·ize [ trángkwə lz, tránkwə lz ](past and past participletran·quil·ized, present participletran·quil·iz·ing, 3rd person present singulartran·quil·iz·es) or tran·quil·lize [ trángkwə lz, tránkwə lz ](past and past participletran·quil·lized, present participletran·quil·liz·ing, 3rd person present singulartran·quil·liz·es)
verb
Definition:
1. transitive verb make somebody calm with medicine: to use medication to induce calmness in a person or animal
2. intransitive verb become calm: to become calm or calmer
3. intransitive verb have calming effect: to have a calming effect