Gambling and gamboling are etymologically unrelated, but their affinity is more than phonetic. There is gamboling on the green and there is gambling on the green baize tabletop. Gamboling can break one's gamba, or leg, and gambling can break one's bankroll. Both activites are called playing...
W.V. Quine
Quiddities: An Intermittently Philosophical Dictionary
Belknap Press, Harvard, 1987, p76
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