Multiple choice general knowledge math & puzzles anti against;opposite great before after Reveal answer Fill a bubble to check yourself A Correct answer Explanation The prefix 'anti-' is derived from Greek, meaning against or opposite, as in 'antidote' or 'antisocial'. 'Before' is 'pre-', 'after' is 'post-', and 'great' is 'mag-' or 'mega-'.