IPA: /ˈpeɪntbɒks/
KK: /ˈpeɪntˌbɑks/
A container designed to hold various types of paint, often used by artists for mixing and storing colors.
She opened her paintbox to find the perfect colors for her artwork.
Paintbox → It is formed from "paint" (from Old French *peindre*, meaning to apply color) and "box" (from Old English *box*, meaning a container). The word "paintbox" refers to a container used for holding paint.
Think of a 'container' ('box') that holds 'color' ('paint') — that's what a paintbox is.