Multiple choice general knowledge math & puzzles per through; complete around into; in forward Reveal answer Fill a bubble to check yourself A Correct answer Explanation The Latin prefix 'per-' means 'through' or 'completely', as in 'permeate' (pass through) or 'perfect' (completely done). 'Around' is 'peri-', 'into' is 'in-', and 'forward' is 'pro-'.