once, eleven; á las — y media, at half-past eleven.
onceja (deprec. of onza), petty ounce.
onde, ¿ónde? = donde, ¿dónde?
onza, ounce (a gold coin, worth about 16 dollars).
ópera, (grand) opera.
operar, to make, operate, take place.
opinión, f., opinion, view.
oponer, to oppose; —se (á), to be opposed to, oppose; — resistencia, to offer resistance.
oportunamente, opportunely, conveniently.
oportunidad, f., opportunity, occasion, opportuneness.