The Collaborative International Dictionary of English v.0.48:

Clumsy \Clum"sy\, a. [Compar. Clumsier; superl. Clumsiest.]
   [OE. clumsed benumbed, fr. clumsen to be benumbed; cf. Icel.
   klumsa lockjaw, dial. Sw. klummsen benumbed with cold. Cf.
   1st Clam, and 1st Clamp.]
   1. Stiff or benumbed, as with cold. [Obs.]
      [1913 Webster]

   2. Without skill or grace; wanting dexterity, nimbleness, or
      readiness; stiff; awkward, as if benumbed; unwieldy;
      unhandy; hence; ill-made, misshapen, or inappropriate; as,
      a clumsy person; a clumsy workman; clumsy fingers; a
      clumsy gesture; a clumsy excuse.
      [1913 Webster]

            But thou in clumsy verse, unlicked, unpointed,
            Hast shamefully defied the Lord's anointed.
                                                  --Dryden.

   Syn: See Awkward.
        [1913 Webster]