The Collaborative International Dictionary of English v.0.48:

Hamble \Ham"ble\ (h[a^]m"b'l), v. t. [OE. hamelen to mutilate,
   AS. hamelian; akin to OHG. hamal[=o]n to mutilate, hamal
   mutilated, ham mutilated, Icel. hamla to mutilate. Cf.
   Hamper to fetter.]
   To hamstring. [Obs.]
   [1913 Webster]