1. 
[syn: cumbersome, cumbrous]
The Collaborative International Dictionary of English v.0.48:
Cumbrous \Cum"brous\ (k?m"br?s), a.
   1. Rendering action or motion difficult or toilsome; serving
      to obstruct or hinder; burdensome; clogging.
      [1913 Webster]
            He sunk beneath the cumbrous weight.  --Swift.
      [1913 Webster]
            That cumbrousand unwieldy style which disfigures
            English composition so extensively.   --De Quincey.
      [1913 Webster]
   2. Giving trouble; vexatious. [Obs.]
      [1913 Webster]
            A clud of cumbrous gnats.             --Spenser.
      -- Cum"brous*ly, adv. -- Cum"brous*ness, n.
      [1913 Webster]
WordNet (r) 3.0 (2006):
cumbrous
    adj 1: difficult to handle or use especially because of size or
           weight; "a cumbersome piece of machinery"; "cumbrous
           protective clothing" [syn: cumbersome, cumbrous]
Moby Thesaurus II by Grady Ward, 1.0:
44 Moby Thesaurus words for "cumbrous":
   Latinate, awkward, bombastic, bulky, burdensome, clogging, clumsy,
   cramped, cumbersome, elephantine, encumbering, forced, formal,
   guinde, halting, hampering, heavy, hindering, hulking, hulky,
   impedimental, impeding, impeditive, incumbent, inkhorn, labored,
   leaden, lubberly, lumbering, lumpish, lumpy, massive, massy,
   onerous, oppressive, pompous, ponderous, sesquipedalian, stiff,
   stilted, superincumbent, turgid, unhandy, unwieldy