complexity noun

ADJ. considerable, enormous, extraordinary, extreme, great, immense | full, sheer Only now did he understand the full complexity of the problem. | growing, increasing | bewildering | unnecessary | added | economic, linguistic, structural, technical the linguistic complexity of Siberia

QUANT. degree, level

VERB + COMPLEXITY convey, highlight, illustrate, reveal It is difficult to convey the sheer complexity of the situation. | grasp, understand

COMPLEXITY + VERB arise (from sth)

PREP. of … ~ a pay system of unnecessary complexity