(adj.adv.) : fīdus, a, um, adj.fido, that one may rely on
* Trusty, truslworthy, faithful, sure (class.).
* Prop., constr. absol., with dat., poet. also with gen.
* Absol.: nihil est stabile quod infidum ... Neque enim fidum potest esse multiplex ingenium et tortuosum,Cic. Lael. 18, 65; cf.: (amico) probo et fideli et fido et cum magna fide,Plaut. Trin. 4, 4, 4: tum se intellexisse, quos fidos amicos habuisset, quos infidos,Cic. Lael. 15, 53: amici,Hor. Ep. 1, 5, 24: sodales,id. S. 2, 1, 30: fidissima atque optima uxor,Cic. Fam. 14, 4, 6: conjux,Hor. Ep. 2, 1, 142: bonus atque fidus judex,impartial,id. C. 4, 9, 40: medici,id. Ep. 1, 8, 9: interpres,id. A. P. 133: fidiora haec genera hominum fore ratus,Liv. 40, 3, 4: nihil fidum, nihil exploratum habere,Cic. Lael. 26, 97: familiaritates fidae,id. Off. 2, 8, 30: canum tam fida custodia,id. N. D. 2, 63, 158: vis canum,Lucr. 6, 1222; cf.: pectus canum,id. 5, 864: pectus,Hor. C. 2, 12, 16: fido animo,firm, steadfast,Liv. 25, 15, 13.
* Transf., objectively of inanim. and abstr. things, sure, certain, safe, trustworthy (mostly poet. and in post-Aug. prose; in Cic. Att. 9, 6, 10, fuga fida is not critically certain; v. Orell. N. cr. ad loc.).
* Poet. with gen.: regina tui fidissima,most faithful towards you,Verg. A. 12, 659; and with gen. partit.: juvenum fidos, lectissima bello Corpora, sollicitat pretio,the trusty ones, trustiest of the youth,Stat. Th. 2, 483.
* With in or ad, and acc.: in amicos fidissimus,Eutr. 7, 8: fidi ad bella duces,Nemes. Cyn. 82.
* With in and abl.: sperabam te mihi fidum in hoc nostro amore fore,Cat. 91, 1 sq.
* Absol.: aures,Ov. M. 10, 382: spes fidissima Teucrum,Verg. A. 2, 281: ensis,trusty,id. ib. 6, 524: alii litora cursu fida petunt,id. ib. 2, 400: nec unquam satis fida potentia, ubi nimia est,Tac. H. 2, 92: pons validus et fidus,id. A. 15, 15 fin.: male fidas provincias,id. H. 1, 52.
* With dat.: (oppidum) naviganti celerrimum fidissimumque appulsu,Tac. A. 3, 1; cf.: statio male fida carinis,Verg. A. 2, 23: montem tantos inter ardores opacum et fidum nivibus,Tac. H. 5, 6.—Sup.: nox arcanis fidissima,Ov. M. 7, 192: camelino (genitali) arcus intendere, orientis populis fidissimum,the surest,Plin. 11, 49, 109, § 261: refugium,Tac. A. 5, 8. — Hence, adv.: fīde, faithfully, trustily (perh. only in the sup.): quae mihi a te ad timorem fidissime atque amantissime proponuntur,Cic. Fam. 2, 16, 4 (al. fidelissime): fidissime amicissimeque vixerunt,Gell. 12, 8, 6.

fīdus = foedus
* A league, v. 2. foedus init.

s. TLL

s. TLL