Simple past tense and past participle of leather.(verb)
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Use "leathered" in a sentence
"With interstatial lung disease, Janine said, the lungs become "leathered" and less able to absorb oxygen."
"The Father Blake, of whom Andy spoke, was more familiarly known by the name of Father Phil, by which title Andy himself would have named him, had he been telling how Father Phil cleared a fair, or equally "leathered" both the belligerent parties in a faction-fight, or turned out the contents (or malcontents) of a public-house at an improper hour; but when he spoke of his Reverence respecting ghostly matters, the importance of the subject begot higher consideration for the man, and the familiar"
"Their skin was brown and leathered with age, and two pointed ears poked through the messy brown hair on each of their heads."