1. A variant of ‘burden’
   "He bore the burthen of his responsibilities"

1. Add a heavy load; increase the weight of a load
   "They burthened down the tarp with rocks to prevent it from blowing away";
   - burden, weight, weight down

Derived forms: burthens, burthening, burthened

Type of: burden, charge, load, loading

Encyclopedia: Burthen