#ola#, f. wave.
#óleo#, m. oil.
#oler#, to smell, sniff out.
#olfatear#, to scent.
#Olivenza#, pr. n.
#olvidar#, to forget.
#once#, eleven; #a las ——#, at eleven o'clock.
#opinar#, to believe, hold the opinion, think.
#oponerse#, to oppose.
#oratorio#, m. private chapel.