austērĭtas (noun F) : austerus (perh. not before the Aug. period).
* Lit.
* Of taste, harshness, sourness (syn.: acerbitas, tristitia, severitas),Col. 11, 2, 68: vini,Plin. 14, 2, 4, § 24; 14, 6, 8, § 65: caepae,id. 19, 6, 32, § 105: picis,id. 14, 1, 3, § 17; Pall. 1, 35, 11; and in plur., id. 1, 35, 8.
* Trop., severity, austerity, rigor: magistri,Quint. 2, 2, 5: qui a te hanc austeritatem exigo,Plin. Ep. 2, 5, 5: cum austeritate imperare,Vulg. Ezech. 34, 4: ex bono esse austeritatem,ib. 2 Macc. 14, 30.

s. TLL