onerous
adjective /ˈəʊnərəs/
/ˈəʊnərəs/, /ˈɑːnərəs/
(formal)- needing great effort; causing trouble or worry synonym taxing
- an onerous duty/task/responsibility
Oxford Collocations DictionaryOnerous is used with these nouns:- burden
- duty
- responsibility
- …
Word Originlate Middle English: from Old French onereus, from Latin onerosus, from onus, oner- ‘burden’.