the state or quality of being complex; complicatedness

intricate; tangled and complicated; (idiom) describes a situation where many different factors are intertwined and difficult to untangle

to complicate; to make something more complex or to become complicated

Work that requires specialized training and a higher level of technical skill, often contrasted with [[简单劳动|簡單勞動|jian3 dan1 lao2 dong4]].

a system composed of many interconnected parts whose behavior is difficult to model due to dependencies or interactions

the branch of computer science and mathematics that classifies problems by their difficulty and the resources, such as time or memory, required to solve them using a computational model