The blood clot would occlude the artery and prevent blood flow.
Synonyms for occlude
obstruct
block
close
Antonyms for occlude
open
clear
unblock
Practice occlude on real SAT questions
Vocabulary like occlude appears on the Digital SAT in Words-in-Context questions, where you choose the word that fits a passage's meaning and tone. You can also drill this word with vocabulary flashcards.