Entries linking to pawnshop
"something given or deposited as security," as for money borrowed, late 15c. (mid-12c. as Anglo-Latin pandum), from Old French pan, pant "pledge, security," also "booty, plunder," perhaps from Frankish or some other Germanic source (compare Old High German pfant, German Pfand, Middle Dutch pant, Old Frisian pand "pledge"), from West Germanic *panda, which is of unknown origin.
The Old French word is formally identical to pan "cloth, piece of cloth," from Latin pannum (nominative pannus) "cloth, piece of cloth, garment" and this formerly was suggested as the source of both the Old French and West Germanic words (on the notion of cloth used as a medium of exchange), but Century Dictionary notes that "the connection seems to be forced."
Meaning "building or room set aside for sale of merchandise" is from mid-14c. Meaning "schoolroom equipped for teaching vocational arts" is from 1914, American English. Sense of "matters pertaining to one's trade" is from 1814 (as in talk shop (v.), 1860).