complicated (adj.)

• abstruse
• arduous
• complex
• compound
• confounded
• confused
• convoluted
• crabbed
• daedal
• devious
• difficult
• elaborate
• entangled
• fancy
• garbled
• gordian
• hard
• implicated
• intricate
• involved
• jumbled
• knotted
• knotty
• labyrinthian
• labyrinthine
• matted
• mazy
• meandering
• multifarious
• obscure
• ornate
• perplexed
• recondite
• roundabout
• scrambled
• snarled
• sophisticated
• subtle
• tangled
• tough
• twisted