strength / energy / enthusiasm / spirit / mood / expression / interest / CL:把[ba3] / Taiwan pr. [jing4]
劲
=
又
+
工
+
力
:
Joan of Arc (ji) is training with lots of energy (劲) in the encampment's bathroom ((e)n4). Again and again the presses a power button (力) which releases a boxing glove (又) fixed to a steel beam (工) which she has to hit with her fist to punch it back into its original position.