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

involved, intricate

having much detail

intricate; involved

using the latest technology

difficult, complex

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

uneven, irregular

(of a person, action) deceptive; (of work etc) having hidden or unexpected difficulties

complicated, difficult

uneven, irregular

uneven, irregular