depressant
adj. 有镇静作用的
n. 镇静剂
近义词：sedative，downer，tranquillizer，soporific，hypnotic，morphine，opiate，barbiturate，painkiller，analgesic，codeine，depressing，tranquilizing，narcotic，drug，tranquilizer，sedativedrug，stimulative，
英英释义
Noun
- a drug that reduces excitability and calms a person
Adjective
- capable of depressing physiological or psychological activity or response by a chemical agent
例句
用作名词(n.)
- Despite being classified as a depressant, alcohol initially acts as a stimulant on the central nervous system.虽说被划定为镇静剂，酒精最初却是被当作中枢神经系统的兴奋剂。