Semicircle
Semi (half) Circle
Tricolor
Tri- (Three) Color
Pronoun
Pro- (for/forward) Noun
Antedate
Ante- (before) Date
Homophone
Homo- (same) Phone (voice/sound)
Automobile
Auto (self) mobile (move)
Polysyllable
Polly- (many) Syllable
Hyperactive
Hyper- (over) Active
