The Collaborative International Dictionary of English v.0.48:
Disencumber \Dis`en*cum"ber\, v. t. [imp. & p. p. Disencumbered; p. pr. & vb. n. Disencumbering.] [Pref. dis- + encumber: cf. F. d['e]sencombrer.] To free from encumbrance, or from anything which clogs, impedes, or obstructs; to disburden. --Owen. [1913 Webster] I have disencumbered myself from rhyme. --Dryden. [1913 Webster]