ocultarse, to hide oneself.
ocupación, f., occupation.
ocupado, -a, occupied, busy.
ocurrido: lo—— , what has happened.
ocho, eight.
ofender, to offend, insult.
ofrecer, to offer.
oído, m., hearing, ear (inner).
oír, to hear.
¡ojalá! (an interjection that expresses keen desire), I hope, I wish, would that, etc.