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onerous adjective

  /ˈoʊnəɹəs/ , /ˈɑnəɹəs/ , /ˈɒnəɹəs/ , /ˈəʊnəɹəs/
  • Imposing or constituting a physical, mental, or figurative load which can be borne only with effort; burdensome.
 обременительный, тягостный

onerousness noun

  • The state or characteristic of being onerous.
 тя́гостность

onerously

обременительно
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