verb (used with object), ob·nu·bi·lat·ed, ob·nu·bi·lat·ing.
to cloud over; becloud; obscure.
Origin: 1575–85; < Latin obnūbilātus, past participle of obnūbilāre to darken, obscure, equivalent to ob-ob- + nūbilāre to become cloudy, verbal derivative of nūbilus cloudy; see nubilous