sedation
/sɪˈdeɪʃən/noun
mass noun
1- the administering of a sedative drug to produce a state of calm or sleep施用镇静剂：
he was distraught with grief and under sedation.
他悲痛欲狂, 因而给他服用了镇静剂。
1.1
- a state of calm or sleep produced by a sedative drug（镇静剂引发的）平静（或睡眠）状态。
词源
mid 16th cent.: from French sédation or Latin sedatio（n-）, from sedare 'settle' （see SEDATE1）.