calmness Copy link Outline 1. tranquillĭtas (both lit. and fig.)2. tranquillum3. Of the mind • calmness: 1. tranquillĭtas (both lit. and fig.): c. of mind, animi t., Cic.: c. of life, t. vitae, Cic. 2. tranquillum: the republic was reduced to c., respublica in tranquillum redacta est, Liv.: Ter.: v. calm. 3. Of the mind: aequus animus: to witness anything with c., aliquid aequo a. videre, Cic.: v. equanimity. (Calmness of mind may also be expr. by placidus animus, tranquillus animus, etc.: v. calm.).