coarsen
1. [ verb ] make less subtle or refined
Examples:

"coarsen one's ideals"

Related terms: change
2. [ verb ] make or become coarse or coarser
Examples:

"coarsen the surface" "Their minds coarsened"

Related terms: change
Similar spelling:   coarsened
  coarsening
  coarseness
  coruscant
  corrosion
  corrasion
  Coregonus
  Corson
  corrigenda
  Courson
  Corzine
  corking
  coursing
  Corazon
  corakan
  coracan
  Corrigan
  coercion