Lewis Short
ămārĭtūdo (noun F) : id.
* Bitterness.
* Lit., of taste (opp. dulcedo; not in Cic. or the poets),Varr. R. R. 1, 66; so Plin. 21, 21, 92, § 16; 24, 14, 77, § 125; 24, 11, 64, § 105: Mara, id est, Amaritudinem,Vulg. Exod. 15, 23.
* Trop., bitterness, severity, acrimoniousness, sadness, sorrow, trouble: ne in bilem et amaritudinem vertat injuria,Plin. Ep. 6, 8: quantum illis (versibus) leporis, dulcedinis, amaritudinis, amoris! id ib. 1, 16, 5: vocis,Quint. 11, 3, 169 Spald. in amaritudine animi meae, Vulg. Isa. 38, 15; ib. Thren. 1, 4.—In plur.: divitiarum frons hilaris, multis intus amaritudinibus (i. e. miseriis) referta,Val. Max. 4, 4; Vulg. Job, 9, 18; ib. Jer. 31, 21 et saep.
Charlton T. Lewis, Charles Short, A Latin Dictionary