[syn: hindrance, hinderance, hitch, preventive, preventative, encumbrance, incumbrance, interference]
The Collaborative International Dictionary of English v.0.48:
Incumbrance \In*cum"brance\, n. [See Encumbrance.] [Written
   also encumbrance.]
   [1913 Webster]
   1. A burdensome and troublesome load; anything that impedes
      motion or action, or renders it difficult or laborious;
      clog; impediment; hindrance; check. --Cowper.
      [1913 Webster]
   2. (Law) A burden or charge upon property; a claim or lien
      upon an estate, which may diminish its value.
      [1913 Webster]
WordNet (r) 3.0 (2006):
incumbrance
    n 1: a charge against property (as a lien or mortgage) [syn:
         encumbrance, incumbrance]
    2: an onerous or difficult concern; "the burden of
       responsibility"; "that's a load off my mind" [syn: burden,
       load, encumbrance, incumbrance, onus]
    3: any obstruction that impedes or is burdensome [syn:
       hindrance, hinderance, hitch, preventive,
       preventative, encumbrance, incumbrance, interference]