elaborate
Meaning: complex, detailed, intricate
Usage: Dan always beats me at chess because he develops such an elaborate game plan that I can never predict his next move.
convoluted
Meaning: intricate, complicated
Usage: Grace’s story was so convoluted that I couldn’t follow it.
ornate
Meaning: highly elaborate, excessively decorated
Usage: The ornate styling of the new model of luxury car could not compensate for the poor quality of its motor.