(bound form) raw substances or materials, such as timber, steel, or medicinal ingredients

raw material; stuff; substances such as grain, feed, or fertilizer

(bound form) source material or data, such as for textbooks, themes, or creative works

material for study or use; data; information; source material for creative works

(bound form) a person's aptitude or ability; a person of a certain capacity, especially a capable or talented individual

a person's aptitude or potential for a certain role; the right stuff