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v. Present participle of jerk.

n. A motion that jerks; a jerk.

n. The act of pulling, pushing, or throwing, with a jerk.

adj. lacking a steady rhythm

n. an abrupt spasmodic movement

"The Indians make this wholesale destruction for two objects; first, to get the meat, which they preserve by "jerking" -- that is, by cutting into thin strips and drying in the sun -- and, secondly, for the skins with which they cover their tents, make their beds, and part of their clothing."

unsteady   

motility    movement    motion    move   

jerk   

lurking    overworking    perking    reworking    shirking    smirking    working