coarsen
['korsn.]
vt. (使)

vi. (使)

1. The sea air coarsened her skin.
   海气使她肤糙。

coarsen
[ verb ]

1. make or become coarse or coarser

<verb.contact>
coarsen the surface
Their minds coarsened

2. make less subtle or refined

<verb.change>
coarsen one's ideals

Coarsen \Coars"en\ (k[=o]rs"'n), v. t.
To make coarse or vulgar; as, to coarsen one's character.
[R.] --Graham.