scrim · noun, verb1
Attested since the end of the 18th century. Origin unknown. In one of the earliest mentions, "The Statistical Account of Scotland", 1793, by John Sinclair, page 593, we read in a paragraph devoted to weavers: "Besides these, they are now much employed in working a thin kind of coarse linen called Silesias, vulgarly Scrims, whereof each piece is 27 or 30 inches broad".
scrim · noun, verb2
From scrimmage.
Etymology from Wiktionary, CC BY-SA 4.0.