v. t. [ imp. & p. p. Decompounded; p. pr. & vb. n. Decompounding. ] [ Pref. de- (intens. in sense 1) + compound, v. t. ] 1. To compound or mix with that is already compound; to compound a second time. [ 1913 Webster ]
2. To reduce to constituent parts; to decompose. [ 1913 Webster ]
It divides and decompounds objects into . . . parts. Hazlitt. [ 1913 Webster ]