tranquilizing

Etymology
From.

Adjective

 * 1) Of a drug: having the effect of calming a person or animal, or putting them to sleep; sedating, sedative.
 * 2)  Having the effect of making someone or something tranquil; calming, soothing.

Noun

 * 1) The act of calming a person or animal, or putting them to sleep, using a drug.
 * 2) The act of making someone or something tranquil.
 * 1) The act of making someone or something tranquil.