tran·quil·ize also Brit tran·quil·lise 
/ˈtræŋkwəˌlaɪz/ verb
tran·quil·iz·es; tran·quil·ized; tran·quil·iz·ing /ˈtræŋkwəˌlaɪz/ verb [+ obj] : to use a drug to cause (a person or animal) to become very relaxed and calm
▪ They tranquilized the bear with a dart so that it could be safely moved to a different area.
▪ They tranquilized the bear with a dart so that it could be safely moved to a different area.
