obumbrate
To shade; to darken; to cloud.
rare
those clouds, which did hang over and thus obumbrate him
To foreshadow, prefigure.
obsolete, transitive
Where it comes from
Borrowed from Latin obumbrātus, perfect passive participle of obumbrō (“to overshadow, cloud”), from ob + to shade; see -ate (verb-forming suffix) and -ate (adjective-forming suffix).
Adapted from the Wiktionary entry obumbrate (CC BY-SA 4.0).