IPA: /ˈdaɪˌstʌf/
KK: /daɪˌstʌf/
A substance used to add color to materials, especially fabrics or other textiles.
The artist used a special dyestuff to create vibrant colors in her fabric designs.
Dyestuff is formed from "dye" (from Old English "deag", meaning to color) and "stuff" (from Old French "estoffe", meaning material or substance). The word "dyestuff" refers to the material used for coloring or dyeing fabrics.
Think of 'dye' as the action of coloring and 'stuff' as the material — dyestuff is the material used for coloring.