cobbler

Inherited from Middle English cobeler, cobelere (“mender of shoes, cobbler”) [and other forms]; further origin unknown. The word appears to be derived from an early form of cobble (“to mend roughly, patch; (specifically) to mend shoes, especially roughly”) + -er (suffix forming agent nouns), but is attested much earlier than the verb which suggests that the verb may be a back-formation from cobbler. Sense 2 (“sheep left to the end to be sheared”) is a pun on cobbler’s last (“tool for shaping or preserving the shape of shoes”); while sense 3 (“clumsy workman”) is derived from cobble + -er: see above.

出典: Wiktionary「cobbler」（CC BY-SA 4.0）