Why was "tantrum" trending last week?
"calm, quiet," 1660s, from Latin sedatus "composed, moderate, quiet, tranquil," past participle of sedare "to settle, calm," causative of sedere "to sit" (see sedentary). Related: Sedately.
"treat with sedatives," 1945, a back-formation from the noun derivative of sedative (adj.). The word also existed 17c. in a sense "make calm or quiet." Related: Sedated; sedating.
sedate se·date (sĭ-dāt')
v. se·dat·ed, se·dat·ing, se·dates
To administer a sedative to; calm or relieve by means of a sedative drug.