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onerous

onerous

24 8.1
Causes a lot of work or trouble
  • adjective
  • /ˈoʊnərəs/
  • Formal
translation icon : oneroso
  • Two- and three-year contracts are considered even more onerous by most customers.
  • onerous burden
  • onerous regulation
  • onerous task

And although we don't set, you know, onerous deadlines, they're still deadlines.

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Examples

  • Meeting these expensive and time-consuming reporting requirements is onerous even for large firms.

    Academic text (2001)
  • In short, the current tasks are much more onerous, and the resources available are meager in comparison.

    Academic text (2011)
  • So it's not quite as onerous as it seems.

  • This is the more difficult, onerous challenge.

  • Now this course does not have onerous requirements, but I expect you to do the requirements that we have.

  • If the industry is to avoid onerous regulation, it should establish safety and environmental standards on its own.

    Academic text (2011)
  • Every time the tax window opens, protection from onerous taxation is up for sale.

    Academic text (1997)
  • Oftentimes... the most onerous decision a leader can take is when to retreat.

  • Federal loans, in particular, would be more progressive and less onerous if they were income contingent.

    Academic text (2012)
  • Completing the project on time felt like an onerous task, requiring late nights and constant revisions.

Synonyms

difficult
vsonerous
1.6

Not easy to do or understand

adds the sense of a troubling obligation that creates extra work or worry
heavy
vsonerous
221 2.1

Hard to do or understand

focuses on causing effort and worry rather than only intensity
arduous
vsonerous
29 7.7

Very difficult to do and needing a lot of effort over a long time

is about involving great effort and practical trouble rather than long duration
burdensome
vsonerous
18 7.1

Causing a lot of extra work or worry

is more about involving great effort and practical trouble
taxing
vsonerous
5 6.8

Needing a lot of physical or mental effort

is more about being a troublesome duty that causes effort and worry

Antonyms

1.0

Not hard to do, understand, or achieve

How Burdensome

oppressive
43 6.3
onerous
  • Formal
24 8.1
taxing
5 6.8
demanding
4.1
manageable
57 3.2

Surface Forms

onerous positive

Morphology

onerous = onus (opaque) = oner + ous

Although formed from a root meaning 'burden' plus the adjective-forming suffix '-ous', the root form 'oner-' is not a standalone English word and learners will not generally connect it to the rare noun 'onus', making the derivation non-obvious.

Etymology

Onerous comes from the Latin root onus, which means 'burden'. So an onerous task is like a heavy load you must carry, needing a lot of effort and causing trouble.