- 镇定自若 zhèndìngzìruò calm and collectedTo be perfectly calm and collected even in an emergency; maintaining one's usual composure without panic
- 镇定剂 zhèndìngjì sedativea medicine used to calm the mood or reduce anxiety and tension; tranquilizer; depressant; downer
- 镇定如常 zhèndìngrúcháng calm as usualcomposed and steady as one normally is; to remain unruffled and maintain one's presence of mind
- 镇定药 zhèndìngyào sedativesedative drug; tranquilizer
