tranquillity Copy link Outline I. PhysicalII. Mental1. tranquillĭtas, tranquillitas animi, Cic. Tusc. 4, 5, 10.2. tranquillus animus3. aequus animus • tranquillity: I. Physical: tranquillĭtas, quies: v. stillness, calmness. II. Mental: 1. tranquillĭtas, tranquillitas animi, Cic. Tusc. 4, 5, 10. 2. tranquillus animus: cf. id. de Sen. 20, 74. 3. aequus animus: v. calmness, equanimity. Phr.: to disturb any one's t. of mind, animum loco et certo de statu demovere, id. Caecin. 15, 42: animum perturbare (v. disconcert): to lose one's t., tumultuans de gradu dejici, Cic. Off. 1, 23, 80: de suo statu se migrare, id. Att. 4, 16: a constantia atque a mente discedere, id. Div. 2, 55, 114: pleasure disturbs the t. of the mind, voluptas mentem e sua sede et statu demovet, id. Parad. 1, 3, 15: to maintain t., aequam mentem servare, Hor. Od. 2, 3, 2.