at·a·rac·tic /ˌætəˈræktɪk/
  心氣和平的
  at·a·rac·tic /-ˈræksɪk/ 形容詞
  心氣和平的,心神安定的,安定藥,精神安定藥
  ataractic
       adj : tending to soothe or tranquilize; "valium has a
             tranquilizing effect"; "took a hot drink with sedative
             properties before going to bed" [syn: ataraxic, sedative,
              tranquilizing, tranquilising]
       n : a drug used to reduce stress or tension without reducing
           mental clarity [syn: tranquilizer, tranquillizer, tranquilliser,
            antianxiety agent, ataractic drug, ataractic agent]