IPA: /ˈfɪʃlaɪn/
KK: /ˈfɪʃlaɪn/
A type of line used for catching fish, typically made of strong material and attached to a fishing rod.
He cast his fishline into the water, hoping to catch dinner.
The word 'fishline' is formed from 'fish' (from Old English *fisc*, meaning a creature that swims in water) and 'line' (from Old English *line*, meaning a cord or string). Together, 'fishline' refers to a cord or string used for catching fish.
Think of a 'cord' ('line') used for catching a 'creature that swims' ('fish') — that's what a fishline is.