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roughen    
vt.
vi. (使)变粗糙

(使)变粗糙

roughen
v 1: make rough or rougher; "roughen the surfaces so they will
stick to each other" [ant: {smooth}, {smoothen}]

Roughen \Rough"en\, v. t. [imp. & p. p. {Roughened}; p. pr. &
vb. n. {Roughening}.] [From {Rough}.]
To make rough.
[1913 Webster]


Roughen \Rough"en\, v. i.
To grow or become rough.
[1913 Webster]


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