Etymology
The verb is derived from Late Middle English embossen, embosen, embocen (“to be bloated; to bulge; to cause to bulge; to ornament in relief, emboss”) [and other forms], from Old French embocer (modern French embosser), from em- (a variant of en- (prefix meaning ‘in, into’)) + boce (“swelling”) + -er (suffix forming verbs); boce (“swelling”) is derived from Vulgar Latin *bottia (“a bump”), ultimately from Proto-West Germanic *bautan (“to beat”), from Proto-Germanic *bautaną (“to beat; to bump, knock; to push”). The English word is analysable as em- (prefix meaning ‘in, into’) + boss (“bump, lump, protuberance”). The noun is derived from the verb.