Sedate
来自Big Physics
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late Middle English (originally as a medical term meaning ‘not sore or painful’, also ‘calm, tranquil’): from Latin sedatus, past participle of sedare ‘settle’, from sedere ‘sit’.
wiktionary
From Latin sedatus, past participle of sedare(“to settle”), causative of sedere(“to sit”).
etymonline
sedate (adj.)
"calm, quiet," 1660s, from Latin sedatus "composed, moderate, quiet, tranquil," past participle of sedare "to settle, calm," causative of sedere "to sit," from PIE root *sed- (1) "to sit." Related: Sedately.
sedate (v.)
"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.
