roughen :

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  • v  make rough or rougher
    roughen the surfaces so they will stick to each other

  • As humans grow older, the innermost layer (intima) of the arteries, ordinarily a thin, smooth membrane, tends to roughen and thicken in a process that may be compared to what .
  • Fakers cannot achieve this subtle chiaroscuro, so they roughen their surfaces with sandblasting to simulate age.
  • If this happens often enough, the artery wall will thicken, roughen and begin to break down.

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