coarsened

/K AO1 R S IH0 N D/
verb
  1. 1

    To make (more) coarse.

    โ€œBecause the wool is of poor quality, it will coarsen the fabric.โ€

  2. 2

    To become (more) coarse.

Source: https://en.wiktionary.org/wiki/coarsen, https://en.wiktionary.org/wiki/coarsened