saddle

n 1: a seat for the rider of a horse 2: a pass or ridge that slopes gently between two peaks (is shaped like a saddle) syn saddleback

3: cut of meat (especially mutton or lamb) consisting of part of the backbone and both loins

4: a piece of leather across the instep of a shoe 5: a seat for the rider of a bicycle syn bicycle seat 6: posterior part of the back of a domestic fowl v 1: put a saddle on; "saddle the horses" ant unsaddle 2: load or burden; encumber; "he saddled me with that heavy responsibility"

3: impose a task upon, assign a responsibility to; "He charged her with cleaning up all the files over the weekend" syn charge, burden

Source: WordNet. Princeton University