made up of many connected parts (and often difficult to understand or explain)

involved, intricate

coiled; twisted

complicated

that cannot be solved or escaped from

complicated

complicated; (of machinery etc) built with many parts and difficult to understand

complicated, elaborate

(of surfaces) not level, smooth or polished; not calm, with uncomfortable movements; not gentle; acting violently

uneven, irregular

(of a room, person etc) not tidy

dirty, disorderly

with the upper side underneath or at the bottom; in disorder

mixed-up

uneven, irregular

uneven, irregular