IPA: //ˈkɪk.bɔːrd//
KK: /ˈkɪkˌbɔrd/
A floating board that swimmers hold onto to help them practice kicking and improve their leg strength while swimming.
The coach gave each swimmer a kickboard to help them work on their kicking technique during practice.
Kickboard → The word is formed from "kick" (of uncertain origin, but likely from Old English *cyccean*, meaning to strike or hit) and "board" (from Old English *bord*, meaning a flat piece of material). The term "kickboard" refers to a flat board that is propelled by kicking, typically used in swimming or for fun.
Think of using your feet to 'strike' ('kick') against a 'flat piece' ('board') to move forward — that's how a kickboard works.
No commonly confused words.