Sedation
来自Big Physics
mid 16th century: from French sédation or Latin sedatio(n- ), from sedare ‘settle’ (see sedate1).
etymonline
sedation (n.)
early 15c., "alleviation of pain;" 1540s, "act of making calm," from French sédation and directly from Latin sedationem (nominative sedatio) "a quieting, assuaging, a calming," noun of action from past-participle stem of sedare (see sedate (adj.)).
