1) Fill with obstructing matter 2) Obstruct 3) To stop up 
to block up; to stop up
• (v. t.) To crowd together; to fill with obstructions; to block up.
Op'pi·late transitive verb [ imperfect & past participle Oppilated ; present participle & verbal noun Oppilating .] [ Latin oppilatus , past participle of oppilare to stop up; ob (see Ob- ) + pilare ...
oppilate 1. To block up a body passage; such as, a duct or a body opening including a pore. 2. Etymology: from Latin oppilate-, past participle of oppilare, 'stop up'; which came from pilare, 'heap up' (as stones).
to stop up; fill with obstructing matter; obstruct.