oppilate
To block, to stop up, to obstruct.
obsolete
Without proper exercise, sluggish fluids tend to settle in the limbs and oppilate the smaller veins.
Where it comes from
The adjective is inherited from Middle English oppilat(e), the verb directly borrowed from Latin oppīlātus, perfect passive participle of oppīlō, see see -ate (verb-forming suffix), -ate (adjective-forming suffix).
Adapted from the Wiktionary entry oppilate (CC BY-SA 4.0).