Definition from Wiktionary, the free dictionary
burthensome (not comparable)
- Obsolete spelling of burdensome.
1662, J.T., “Grim the Collier of Croyden”, in A Select Collection of Old English Plays, Vol. VIII (4th edition):
- All ye that, as I do, have felt this smart, Ye know how burthensome 'tis at my heart.
1889, Charlotte M. Yonge, A Reputed Changeling:
- "I can, madam, but I do not love one," said Anne, thinking of her most burthensome one.
1890, John Richard Green, History of the English People, Volume I (of 8):
- A labour-rent thus became more difficult to enforce, while the increase of wealth among the tenantry and the rise of a new spirit of independence made it more burthensome to those who rendered it.