means A network of knotted or woven cord, mesh, or fabric used to catch, hold, or block things — or, by extension, any interconnected structure or a final amount left after deductions.

from From Old English 'net' (or 'nett'), a tool of fishers and fowlers, with deep roots across the Germanic family — compare Dutch 'net' and German 'Netz' — all tracing back to Proto-Germanic '*natją'. The financial sense ('net profit,' what remains after the deductions are stripped away) is a separate borrowing from French 'net' meaning 'clean, clear, neat,' which itself descends from Latin 'nitidus,' shining and tidy — a different word entirely that happens to wear the same three letters.