“firmness” in Latin

firmitas (as visible quality; e.g., of a body, etc.; then IMPROP., of character, that makes it apt to resist temptation): firmitudo (as an innate and abiding quality; then IMPROP., of mental firmness; e.g., firmitudo gravitasque animi): soliditas (solidity, durability, e.g., of a wall): stabilitas (stability, of whatever stands fast and firm): animi firmitudo (Cic., Caes., Tac.): animi fortitudo: animus certus or confirmatus (resoluteness, mental firmness): constantia (IMPROP.; consistency in one’s conduct, constancy): perseverantia (IMPROP.; the firmness displayed by him who does not allow himself to be deterred from his resolutions). A noble firmness, libera contumacia (i. e., noble defiance; Cic., Tusc., 1, 29, 71): to show a noble firmness, liberam contumaciam adhibere (ibid.): an inflexible firmness, irrevocabilis constantia (Plin., Ep., 3, 7, 2): to proceed in anything with firmness, constantiam adhibere alicui rei: to display great firmness in anything, fortissimum esse in re (e.g., in causa suscepta, of an advocate): you must retain your firmness, or show your firmness, retinenda est vobis constantia: with firmness, Vid: FIRMLY.