1941, Emily Carr, Klee Wyck, Chapter 6 "D'Sonoqua," http://www.gutenberg.net.au/ebooks01/0100131h.html
She appeared to be neither wooden nor stationary, but a singing spirit, young and fresh, passing through the jungle. No violence coarsened her; no power domineered to wither her. She was graciously feminine.
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[…] as the years went by, democracy and its wide audiences tended to broaden and coarsen humor.
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Because the wool is of poor quality, it will coarsen the fabric.
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He was intolerable now except under the influence of liquor, and as he seemed to decay and coarsen under her eyes, Gloria's soul and body shrank away from him […]
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