grist

Concise Oxford English Dictionary © 2008 Oxford University Press:
grist/ɡrɪst/

▶noun

• 1 corn that is ground to make flour.

• 2 malt crushed to make mash for brewing.

– phrases
grist to the (or one's) mill something that can be used for profit or advantage.

– origin OE ‘grinding’, of Gmc origin; rel. to grind.