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• n  a variant of `burden'
• v  weight down with a load

• The burthen of his remarks was the old scare that the world's food supply will some day fall far short of its population.
• Most of those views, like his language"marplot," "whilst," "burthen," "blatherskite," "milch cows" have a 19th century texture.
• May we all remember that it can only be preserved by respecting the rights of the States and distributing equally the benefit and the burthen of the Union.

• burden
• weight
• weight down

• unburden