burden (
http://definr.com/burden)
n 1: an onerous or difficult concern; "the burden of
responsibility"; "that's a load off my mind" [syn:
load,
encumbrance,
incumbrance,
onus]
2: weight to be borne or conveyed [syn:
load,
loading]
3: the central meaning or theme of a speech or literary work
[syn:
effect,
essence,
core,
gist]
4: the central idea that is expanded in a document or discourse
v 1: weight down with a load [syn:
burthen,
weight, {weight
down}] [ant:
unburden]
2: impose a task upon, assign a responsibility to; "He charged
her with cleaning up all the files over the weekend" [syn:
charge,
saddle]