The prefixes pre and pro usually mean before. Pro can also mean forward. The prefix de means down, nor or reverse. De can also mean apart or aside. The prefixes con or com mean with or together. The prefix mis usually means bad or badly.
propelling, competitors, provision, conference, previous, dedicate, deposited, complaint, depended, decreased, predicted, progress, misunderstood, confused, presume, prescription, mispronounced, prevented, compelled, confirmation