Chorus or refrain of a song/poem.
[n] weight to be borne or conveyed
[n] an onerous or difficult concern; "the burden of responsibility"; "that's a load off my mind"
[n] the central idea that is expanded in a document or discourse
[n] the central meaning or theme of a speech or literary work
[v] impose a task upon, assign a responsibility to; "He charged her with cleaning up all the files over the weekend"
[v] weight down with a load
burthen, charge, core, effect, encumbrance, essence, gist, incumbrance, load, load, loading, onus, saddle, weight, weight down