carpus (n.)

late Old English hwearf "shore, bank where ships can tie up," earlier "dam, embankment," from Proto-Germanic *hwarfaz (source also of Middle Low German werf "mole, dam, wharf," German Werft "shipyard, dockyard"); related to Old English hwearfian "to turn," perhaps in a sense implying "busy activity," from PIE root *kwerp- "to turn, revolve" (source also of Old Norse hverfa "to turn round," German werben "to enlist, solicit, court, woo," Gothic hvairban "to wander," Greek karpos "wrist," Sanskrit surpam "winnowing fan"). Wharf rat is from 1812 as "type of rat common on ships and docks;" extended sense "person who hangs around docks" is recorded from 1836.

"of or pertaining to the wrist," 1743, from Modern Latin carpalis, from carpus "wrist" (see carpus). Carpal tunnel syndrome is attested by 1970, from carpal tunnel (1896), the tunnel-like passage that carries nerves through the wrist.