i Register
In some senses, burthen is marked as archaic, obsolete, historical. Watch for register when choosing this word.
noun
Archaic form of burden.
Nor less, I trust, To them I may have owed another gift, Of aspect more sublime; that blessed mood, In which the burthen of the mystery, In which the heavy and the weary weight Of all this unintelligible world, Is lightened:
It was with a daughter of Mr Shepherd, who had returned, after an unprosperous marriage, to her father's house, with the additional burthen of two children.
Archaic form of burden.
[...] and thence to Calstock, a town on the Tamar, which is washed by the sea flowing through Plymouth Sound and Hamoaze, and which place vessels of 200 tons burthen can reach at spring tides—[...].
Archaic form of burden.
Archaic form of burden.
verb
Archaic form of burden.
he other men were variously burthened; some carrying picks and shovels – for that had been the very first necessary they brought ashore from the Hispaniola – others laden with pork, bread, and brandy for the midday meal.