Source : Webster's Revised Unabridged Dictionary (1913)

Benumb \Be*numb"\, v. t. [imp. & p. p. {Benumbed}; p. pr. & vb.
   n. {Benumbing}.] [OE. binomen, p. p. of binimen to take away,
   AS. beniman; pref. be + niman to take. See {Numb}, a., and
   cf. {Benim}.]
   To make torpid; to deprive of sensation or sensibility; to
   stupefy; as, a hand or foot benumbed by cold.

         The creeping death benumbed her senses first. --Dryden.

Benumbed \Be*numbed"\, a.
   Made torpid; numbed; stupefied; deadened; as, a benumbed body
   and mind. -- {Be*numbed"ness}, n.

Source : WordNet®

benumbed
     adj 1: lacking sensation; "my foot is asleep"; "numb with cold"
            [syn: {asleep(p)}, {numb}]
     2: having lost or been caused to lose interest because of
        overexposure; "the mind of the audience is becoming
        dulled"; "the benumbed intellectual faculties can no
        longer respond" [syn: {dulled}]