operario, m., workman, operative.
opinar, to think.
opinión, f., opinion, idea, notion, impression.
oponer, to oppose.
oponga, pres. subj. of oponer.
oportunidad, f., opportunity.
oprimir, to oppress.
oprobio, m., ignominy, dishonor, shame.
opulencia, f., wealth, opulence.
oración, f., prayer.