thread

[1]	string
[2]	file , wind , pass , squeeze (through) , pick/make (one's) way (through) , inch , ease
[3]	weave , wind , meander , wander
[4]	string , draw

[1]	fibre , yarn , filament , strand , (piece of) yarn , string , line , cord , twine
[2]	theme , ribbon , plot , story-line , subject , motif , thesis , course , drift , direction , tenor , train (of thought) , sequence/train/chain of events
[3]	train of thought
[4]	screw thread