1. s. tranquillitas, tranquillitates (the state of the sea when there is no storm; plur. of a continued calm: malacia (the state of the sea when there is no wind). (The words are found in this connection and order), malacia et tranquillitas. FIG., animi tranquillitas; quies; otium.
2. adj. tranquillus (without any violent motion, especially of the sea when not stirred by winds): quietus (in a state of rest; without exertion). (The words are found in this connection and order), tranquillus et quietus: sedatus (without any stormy violence; e.g., gradus, tempus): placidus (without violent motion, disturbance. etc, caelum, dies, somnus, amnis): otiosus (undisturbed by troublesome business): qui omni vento caret (dies). A calm life, vita otiosa, tranquilla, tranquilla et quieta, placida: a calm sea, mare tranquillum or placidum. To be calm, quietum esse, quiescere. Vid: Tranquillus, quietus, placidus, sedatus, placatus. are all applied, also, to the mind, and its operations: quietus, allied in sense to otiosus, segnis, languidus; tranquillus to lenis. placidus, moderatus, Döderlein. (The words are found in this connection and order), placidus quietusque; placatus et tranquillus; sedatus et quietus; sedatus placidusque. Calm speech, oratio placida or sedata. To do anything in a calmer mood, placatiore animo facere aliquid: to write in a calmer mind, sedatiore animo scribere. To be calm (in mind), animo esse quieto, or tranquillo, or placato: animo non commoveri. Be calm, quiesce (be quiet): sile; taceas quaeso! (be silent): bono sis animo! bonum habe animum (be of good courage). Their minds are not yet calm, mentes nondum resederunt.
3. v. tranquillare (to make anything rest: PROP., the sea; IMPROP., men’s minds, animos): pacare (to reduce to peace; e.g., provinciam): sedare (to make to settle quietly down; e. g, anger; the winds. Ov.: the waves, Cic.): placare (to bring to a milder, quieter state; e.g., iram: also aequora. Ov.): permulcere (to calm by soothing words, etc.: the mind, anger): lenire (to bring to a milder state; anger, fear. etc.): reprimere (to repress excitement in anybody: e.g. concitatam multitudinem, Nep.). To calm anybody’s mind by encouraging words, alicujus animum verbis confirmare: by comforting words, aliquem, or animum alicujus consolatione lenire, or permulcere. To calm one’s self, acquiescere.