Definition of onerous adjective from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈəʊnərəs//
; NAmE NAmE//ˈɑːnərəs//
, NAmE//ˈoʊnərəs//
jump to other results
needing great effort; causing trouble or worry synonym taxing an onerous duty/task/responsibility Word Origin late Middle English: from Old French onereus, from Latin onerosus, from onus, oner- ‘burden’.
See the Oxford Advanced American Dictionary entry: onerous