Lewis Short
(adjective) : tĕmĕrārĭus, a, um, temere.
* That happens by chance, accidental, casual (so very rare; cf. fortuitus): sed quid hoc, quod picus ulmum tundit? hau temerarium'st,Plaut. As. 2, 1, 14: non temerarium est, ubi dives blande appellat pauperem,id. Aul. 2, 2, 7: quaestus temerarius incertusque, Fest. s. v. navalis scriba, p. 169 Müll.; tributum temerarium,id. p. 364, b, ib.; cf. Becker, Antiq. 3, 2, p. 129 sq.
* Rash, heedless, thoughtless, imprudent, inconsiderate, indiscreet, unadvised, audacious (freq. and class.; syn.: audax, audens): temulenta mulier et temeraria,Ter. And. 1, 4, 2: homines temerarii atque imperiti,Caes. B. G. 6, 20: hominem esse barbarum, iracundum, temerarium,id. ib. 1, 31: caeca ac temeraria dominatrix animi cupiditas,Cic. Inv 1, 2, 2: non sum tam temerarius nec audax,Mart. 4, 43, 2: parce meo, juvenis, temerarius esse periclo,Ov. M. 10, 545.— Of things: ea sunt et turbulenta et temeraria et periculosa,Cic. Caecin. 12, 34; id. N. D. 1, 1, 1; Liv. 25, 37, 17: duabus animi temerariis partibus conpressis,Cic. Div. 1, 29, 61: consilium, Planc. ap. Cic. Fam. 10, 21, 2; vox, Liv 23, 22, 9: virtus,Ov. M. 8, 407: error,id. ib. 12, 59: querela,id. Tr. 5, 13, 17: bella,id. M. 11, 13: tela,i. e. sent thoughtlessly,id. ib. 2, 616: temerarium est, ante crassitudinem pollicarem viti imperare,Plin. 17, 22, 35, § 177: temerarium est, secundis non esse contentum,Plin. Ep. 4, 9, 10.
Charlton T. Lewis, Charles Short, A Latin Dictionary