ataraxy
 oxford
 views  updated May 14 2018at·a·rax·y  / ˈatəˌraksē/ (also at·a·rax·i·a / ˌatəˈraksēə/ ) •
n. a state of serene calmness.DERIVATIVES: at·a·rac·tic / ˌatəˈraktik/ adj.at·a·rax·ic / ˌatəˈraksik/ adj.
 The Oxford Pocket Dictionary of Current English