onerous
//ˈɒn.ər.əs//
Adjective
onerousCanonical form
more onerousComparative
most onerousSuperlative
1
Involving a great deal of effort, trouble, or difficulty; burdensome.
The onerous task of organizing all the documents took several days.
2
(Law) Involving heavy obligations or responsibilities.
The contract contained several onerous clauses that placed significant legal obligations on the tenant.