This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. : Present participle of jew.

n. The carunculation of the base of the beak of some varieties of the domestic pigeon; the lobes or wattles of the lower mandible, often in the form of three small fleshy processes, one at each side and a third beneath and before the others.

"It is wonderfully interesting to wander about these narrow, winding streets, and into the dark, sometimes ill-smelling stores, but one should early learn the gentle art of "jewing down" the prices that are first asked for goods that are offered for sale."