Occlude

hard

uh-KLOOD

verb

Definition

to block, obstruct, or close off

Examples

Plaque can occlude an artery until blood barely trickles through.
Thick clouds occluded the moon, leaving the trail in total darkness.

Synonyms

obstructblockclogstop up

Antonyms

openclearunblockexpose

Categories

GRE Tip

Occlude is a hard-difficulty GRE word. On the GRE, you might see it paired with synonyms like "obstruct" or "block" in Sentence Equivalence questions. Look for contrast clues (however, despite, although) that signal the opposite meaning. Words like "open".

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