Source : Webster's Revised Unabridged Dictionary (1913)

Disburthen \Dis*bur"then\, v. t. [imp. & p. p. {Disburthened};
   p. pr. & vb. n. {Disburthening}.] [Cf. {Disburden}.]
   To disburden; to relieve of a load. [Archaic]