Opposite of post- (3)

I believe the answer is:

pre

(Other definitions for pre that I've seen before include "Combining form meaning before" , "Before starting" , "Before, prior to" , "Prefix meaning before" , "Before or ahead of" .)

I've seen this clue in the Penny Press, the Newsday, the Universal, the King Feature Syndicate, the Family Time, the USA Today, The New York Times, the LA Times and The Wall Street Journal.

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