Syn
Meaning: Together
Words: Synonym, Synchronize, Synopsis
Super
Meaning: Over
Words: Supervise, Superb, Superior, Supernatural
Sym
Meaning: Together
Words: Symbiosis, Symphony, Symmetry, Sympathy
Tri
Meaning: Three
Words: Tricycle, Triangle, Triceratops, Traid
Un
Meaning: Not
Words: Unfit, Unequal, Unearned, Unconventional