IPA: /ˈbækswɪmər/
KK: /ˈbækswɪmər/
A type of water bug that swims on its back using its large hind legs.
The backswimmer glided effortlessly across the surface of the pond.
Backswimmer → The word is formed from "back" (from Old English "bæc", meaning the rear or reverse side) and "swimmer" (from Old English "swimman", meaning to move through water). A backswimmer is an aquatic insect that swims on its back.
Think of the 'back' as the rear side and 'swimmer' as someone moving through water — a backswimmer is an insect that swims on its back.
No commonly confused words.