gruby

In a sentence

• Kupiłem gruby sweter na zimę.

  I bought a thick sweater for winter.

  Here, 'gruby' describes the thickness of the sweater, emphasizing its suitability for cold weather.

• On jest bardzo gruby, powinien zadbać o swoje zdrowie.

  He is very overweight; he should take care of his health.

  In this case, 'gruby' refers to someone's weight, indicating that the person is overweight.

• Ewa popełniła gruby błąd w pracy.

  Ewa made a serious mistake at work.

  'Gruby' is used in a metaphorical sense here, referring to the severity of a mistake.