['(h)wipsɔ:]
n.
狭边钩齿粗木锯,双重不利的事物
vt.
用粗木锯锯,使受双重损失
vi.
利用一方打击另一方

Whipsaw \Whip"saw`\, n.
1. A saw for dividing timber lengthwise, usually set in a
frame, and worked by two persons; also, a fret saw.

2. A kind of narrow ripsaw, tapering from butt to point, with
hook teeth and averaging from 5 to 71/2 feet in length,
used by one or two men.
[Webster 1913 Suppl.]


Whipsaw \Whip"saw`\, v. t.
1. To saw with the whipsaw.
[Webster 1913 Suppl.]

2. To defeat in, or cause to lose, two different bets at the
same turn or in one play, as a player at faro who has made
two bets at the same time, one that a card will lose and
another that a different card will win; hence, to defeat
in spite of every effort.
[Webster 1913 Suppl.]

3. to cause to suffer a setback or losses by subjecting to
two forces at the same time or in rapid succession; as,
consumers were whipsawed by both inflation and higher
sales taxes.
[PJC]

4. (Finance) to cause to suffer a series of losses in trading
when buying and selling at the wrong times in a rapidly
fluctuating market; -- especially used when an attempt is
made, by selling short, to recover losses from a long
purchase in a declining market, and the short sale also
results in a loss when the market subsequently rises. Used
mostly in the passive; as, to be whipsawed by exaggerated
responses to a changing outlook.
[PJC]