Lewis Short
(v. a.P. a.P. a.) : offirmo (obf-), āvi, ātum, 1, v. a. and n. ob-firmo
* To render firm, durable, or steadfast (class. only in the P. a.).
* Lit.: pertica, quā stabuli fores offirmari solebant, arrepta,to fasten, bolt,App. M. 7, p. 200: corium,id. ib.
* Trop., to hold fast to, persevere in: certum offirmare est viam me, quam decrevi persequi,Ter. Hec. 3, 5, 4: se,to persist, be obstinate,id. Heaut. 5, 5, 8: vir impius procaciter obfirmat vultum suum,Vulg. Prov. 21, 29: faciem,id. Ezek. 4, 3: spiritus,id. Dan. 5, 20.—So without se, neutr.: censen' posse me offirmare? Ter Eun. 2, 1, 11.—With inf.: offirmastin' oc cultare, quo te immittas, pessume?Plaut. Pers. 2, 2, 40.—Hence, offirmātus (obf-), a, um, P. a., firm, resolute, obstinate: animus fortis atque offirmatus,Plaut. Am. 2, 2, 15: satin offirmatum quod mihi erat, id me exorat,settled, resolved on,id. Bacch. 5, 2, 83.—Comp.: mihi videtur illius voluntas obstinatior et in hāc iracundiā offirmatior,Cic. Att. 1, 11, 1.—Adv.: offirmātē (obf-), firmly, stubbornly (post-Aug.): offirmate resistere,Suet. Tib. 25.
Charlton T. Lewis, Charles Short, A Latin Dictionary