What does abrade mean?
The definition of abrade
Ab*rade”, v. t.
[imp. & p. p. Abraded; p. pr. & vb. n. Abrading.]
Etym: [L. abradere, abrasum, to scrape off; ab + radere to scrape. See Rase, Raze.]

To rub or wear off; to waste or wear away by friction; as, to abrade rocks. Lyell.

A*brade”, v. t.
Same as Abraid. [Obs.]