encumbrance

(noun) an onerous or difficult concern. Synonyms: burden, load, incumbrance, onus. Examples: "The burden of responsibility." "That's a load off my mind."

(noun) a charge against property (as a lien or mortgage). Synonyms: incumbrance.

(noun) any obstruction that impedes or is burdensome. Synonyms: hindrance, hinderance, hitch, preventive, preventative, incumbrance, interference.