corrivate
To flow, or cause to flow, together, like water drawn from several streams.
obsolete
Veins are hollow and round, like pipes, arising from the liver, carrying blood and natural spirits; they feed all the parts. Of these there be two chief, vena porta and vena cava, from which the rest are corrivated.
Where it comes from
Borrowed from Latin corrīvātus, perfect passive participle of corrīvō (“to corrivate”) (see -ate (verb-forming suffix)), from con- + rīvus + -ō.
Adapted from the Wiktionary entry corrivate (CC BY-SA 4.0).