From Longman Dictionary of Contemporary Englishonerouson‧er‧ous /ˈɒnərəs, ˈəʊ- $ ˈɑː-, ˈoʊ-/ adjective formal DIFFICULTwork or a responsibility that is onerous is difficult and worrying or makes you tired → burdensome an onerous task
Examples from the Corpus
onerous• In practice this may not be onerous as very limited factual information is contained in the typical advertisement.• Such a responsibility can prove onerous because a child who comes from an introverted home is likely to be introverted her/himself.• But this does put an exceedingly onerous burden on women who are required to bear, rear and look after the offspring.• To disqualify one of the prosecutors with three weeks to trial would be an onerous burden.• Their onerous errand completed, the men resumed their jobs.• In the western part of the country, onerous taxes have depressed investments and slowed the introduction of modern technology.• The owner of a patent does not have the unfettered right to make an invention available only on onerous terms.onerous task• The preparation of a Management Plan need not be a onerous task.• You have a self-disciplined and energetic approach to life now that should help you get even the most arduous and onerous tasks done.• But Lind's claim to the prize, relying on the more onerous task of comparing different individuals, remains the stronger.• He will have the onerous task of reviving low morale.• They need to know that the onerous tasks they are performing are done correctly and are appreciated by line managers.• Father Conlin combined all these many onerous tasks with great efficiency but above all with constant good humour and kindness.Origin onerous (1300-1400) Old French onereus, from Latin onerosus, from onus; → ONUS 