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were tainting

  • past progressive
    of taint.
    taint
    noun
    a trace of something bad, offensive, or harmful.

Example Sentences

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He thought the oil wells were tainting the water, and the fish wouldn't breed—and the iron slag, too, was spoiling the river, and he knew it.

From Afloat on the Ohio An Historical Pilgrimage of a Thousand Miles in a Skiff, from Redstone to Cairo by Reuben Gold Thwaites