tranquilizing /ˈtɹæŋkwɪˌlaɪzɪŋ/adjective 2noun 3forms 2 adjective2 •Of a drug: having the effect of calming a person or animal, or putting them to sleep; sedating, sedative. •(literary) Having the effect of making someone or something tranquil; calming, soothing. noun3 •The act of calming a person or animal, or putting them to sleep, using a drug. •The act of making someone or something tranquil. •gerund of tranquilize formsmore tranquilizing · most tranquilizing