defnydd

Etymology
From. Cognate with 🇨🇬.

Noun

 * 1) material, stuff; matter, substance, essence; element, constituent part, particle; make-up, nature
 * 2) matter, question, subject matter; work ; content
 * 3)  requisites
 * 4) implement, instrument, gear; part, accessory
 * 5) use, service; application; purpose, end, effect
 * 6) cause, occasion, reason; origin
 * 7) (future) form or status

Usage notes
When referring to physical "material" such as "fabric" or "cloth", the word defnydd tends to be used. , on the other hand, usually refers to other kinds of material sych as deunydd dysgu "learning material".