—— opēs, [61].

oportet, [138];

—— w. subjv., [295], 6; 8;

—— w. inf., [327], [330].

oportuit, with pres. inf. 'ought to have', [270], 2;

—— with perf. inf., [270], 2, a.

oppidum (Genavam ad oppidum), [182], 2, a.

Optative subjv., [272]; [279];

—— substantive clauses developed from, [296].

optimātēs, decl., [40], 1, d.