coarsen

1. Make or become coarse or coarser (synset 201256032)
   "coarsen the surface"; "Their minds coarsened"
   is a type of: alter, change, modify - cause to change; make different; cause a transformation
2. Make less subtle or refined (synset 200136251)
   "coarsen one's ideals"
   is a type of: alter, change, modify - cause to change; make different; cause a transformation

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