tranquille
From LSJ
Latin > English (Lewis & Short)
tranquillē: adv., v. tranquillus.
Latin > French (Gaffiot 2016)
tranquillē¹⁴ (tranquillus), tranquillement, paisiblement : Cic. Tusc. 3, 25, etc. || tranquillius Sen. Ep. 71, 15 ; -issime Suet. Aug. 2.