vehementia
From LSJ
Ῥίζα γὰρ πάντων τῶν κακῶν ἐστιν ἡ φιλαργυρία → Root of all the evils is the love of money (Radix omnium malorum est cupiditas)
Latin > English (Lewis & Short)
vĕhĕmentĭa: ae, f. id. (post-Aug.).
I Eagerness, fervency, vehemence: Pollio Asinius fuit acris vehementiae, Plin. 36, 5, 4, § 33: Gracchi, Gell. 1, 11, 14.—
II Strength: odoris, Plin. 13, 8, 16, § 59: saporis, id. 19, 5, 27, § 88; cf. id. 23, 1, 21, § 36: venarum, i. e. a strong pulse, id. 23, 1, 24, § 48: linteorum strigilumque, i. e. a copious use, id. 28, 4, 14, § 55.—
B Of language: inter hujus generis et illius superioris vehementiam hoc interest, Auct. Her. 4, 19, 26.