1. Make more complicated
   "There was a new development that complicated the matter"
   - perplex 
2. Make more complex, intricate, or richer
   - refine, rarify, elaborate

Derived forms: complicated, complicating, complicates

See also: complication

Type of: alter, change, modify

Antonym: simplify

• The Virgin
• the way of the world
• the ways of the world
• the whole way
• Thea
• Theaceae
• theanthropism
• thearchy
• theater
• theater company
• theater critic
• theater curtain
• theater director
• theater in the round
• theater light
• theater of operations
• theater of the absurd
• theater of war
• theater prompter
• theater stage
• theater ticket
• theatergoer
• theatre
• theatre company
• theatre critic