сложный

1) General subject: Byzantian, Byzantine, Gordian, anfractuous, complex, complicated, compound, curlicue, daedal, decomposite, elaborate, esoteric, far out, inextricable, intricate, involute, involved, knotted, knotty, multiple, multiplex, multiplicate, operose, perplexed, plexiform, profound, sinuated, sinuous, sophisticated (о приборе, машине, системе и т. п.), tangly, trick, trickish, tricky, woofed, composite, tough (a tough question - сложный вопрос), (о приборе) multi-layered, problematic, boffinated, sensitive, ambitious

2) Computers: multiaspect

3) Geology: aggregate

4) Colloquial: far-out

5) Latin: compositus

6) Military: (об оборудовании) sophisticated

7) Engineering: difficult, sophistic

8) Bookish: Daedalean, Daedalian, Dedalian

9) Construction: mixed

10) Mathematics: entangled

11) Railway term: complicate, elaborated, multiple belting

12) Economy: challenging

13) Australian slang: hairy, mongrel (проект, работа и т.п.)

14) Diplomatic term: troublesome

15) Forestry: multi-storeyed

16) Psychology: complicated (для понимания, объяснения, решения)

17) Scottish language: wimpled

18) Jargon: rugged

19) Drilling: blended, combined, component

20) Makarov: built-up, composition, convoluted, deep, formidable, implex, multiple (напр. о линзах), multiple (напр., о линзах), tangled

21) Current usage: complexicated (Last night's math homework was complexicated.)

22) Cement: perplex