complicate

Synonyms: add fuel to fire bedevil clog combine confound convolute derange disarrange disorder elaborate embroil entangle fold foul up handicap impede infold interfuse interrelate interweave involve jumble make intricate make waves mix up muck up muddle multiply obscure open can of worms perplex ravel render unintelligible screw up snafu snag snarl up tangle twist upset

Antonyms: disentangle ease explain facilitate make simple untangle