lever, delever, leverage

lever: (n, v)
leverage: (n) The action of a lever;
mechanical advantage gained by the lever.

delever

"So How Did Lehman Delever? A Not-Very-Pretty Possibility"
http://www.nakedcapitalism.com/2008/06/so-how-did-lehman-delever-not-very.html
(admittedly)

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delver: one digging like a spade?
spade: 鏟子,鋤,黑桃; broad two-edged sword,

鋤頭: hoe