potsherd (n.)

"piece or fragment of an earthenware pot," mid-14c., from pot (n.1) + Middle English schoord, from Old English sceard "fragment" (see shard). An early form of it was also pot scarth, from Middle English scarth "a pottery fragment" (c. 1400; 12c. in place-names), from Old Norse skarð, apparently a cognate of Old English sceard, though attested only as "notch, mountain pass," but compare Old Swedish scarþer "splinter."