IPA: //ˈpeɪntˌbrʌʃ//
KK: /ˈpeɪntˌbrʌʃ/
A tool with bristles used for applying paint to a surface.
She used a paintbrush to create a beautiful landscape on the canvas.
Paintbrush → It is formed from "paint" (from Old French *peindre*, meaning to apply color) and "brush" (from Old English *brysc, brusshe*, meaning to sweep or clean). The word "paintbrush" refers to a tool used to apply color or paint onto a surface.
Think of 'applying color' ('paint') with a tool that 'sweeps' or 'cleans' ('brush') — that's what a paintbrush does.