firmĭtūdo (noun F) : firmus
* Firmness, durability, strength (less freq. than firmitas, but class.).
* Lit.: tanta in eis (navibus) erat firmitudo,Caes. B. G. 3, 13, 8; cf.: tanta erat operis (i. e. pontis) firmitudo,id. ib. 4, 17, 7: vocis,Auct. Her. 3, 11, 20.
* Trop., firmness, constancy, stability, strength of mind: animi,Plaut. As. 2, 2, 54; cf.: quod firmitudinem gravitatemque animi tui perspexi,Cic. Fam. 5, 13, 3: quantum esset hominibus praesidii in animi firmitudine,Caes. B. C. 3, 28, 4: animi,Tac. A. 4, 8: in patientia firmitudinem simulans,id. ib. 6, 46fin.; cf. ib. 15, 62: non quod salus ab isto data quicquam habitura sit firmitudinis,Cic. Att. 11, 14, 2: haec constitutio habet firmitudinem,id. Rep. 1, 45: (translationes) per se minus habeant firmitudinis,id. Inv. 2, 19, 58.

s. TLL