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The Collaborative International Dictionary
Oppilate

Oppilate \Op"pi*late\, v. t. [imp. & p. p. Oppilated; p. pr. & vb. n. Oppilating.] [L. oppilatus, p. p. of oppilare to stop up; ob (see Ob-) + pilare to ram down, to thrust.] To crowd together; to fill with obstructions; to block up. [Obs.]
--Cockeram.

Wiktionary
oppilate

vb. (context rare English) to block, to stop up, to obstruct