If this happened, work had to be suspended until a new block was engraved, or until the sections were reglued.
early 13c., from Old French glu "birdlime" (12c.), from Late Latin glutem (nominative glus) "glue," from Latin gluten "glue, beeswax," from PIE *gleit- "to glue, paste" (cf. Lithuanian glitus "sticky," glitas "mucus;" Old English cliða "plaster"), from root *glei- "to stick together" (see clay). In reference to glue from boiled animal hoofs and hides, c.1400. Glue-sniffing attested from 1963.
late 14c., from Old French gluer, from glu (see glue (n.)). Related: Glued; gluing.