The Collaborative International Dictionary of English v.0.48:
degarnish \de*gar"nish\, v. t. [imp. & p. p. degarnished; p.
pr. & vb. n. degarnishing.] [F. d['e]garnir; pref. d['e]-,
des- (L. dis-) + garnir to furnish. See Garnish, and cf.
Disgarnish.]
1. To strip or deprive of entirely, as of furniture,
ornaments, etc.; to disgarnish; as, to degarnish a house,
etc. [R.]
[1913 Webster]
2. To deprive of a garrison, or of troops necessary for
defense; as, to degarnish a city or fort. [R.]
--Washington.
[1913 Webster]