peores

In a sentence

• Estas son las peores semanas que hemos experimentado.

  These are the worst weeks we have experienced.

  Here, 'peores' is used as an adjective to describe 'semanas' (weeks), indicating that they are the ones of lowest quality or most unfavorable within a comparison.

• Los peores resultados en el examen fueron inesperados.

  The worst results in the exam were unexpected.

  In this sentence, 'peores' functions as an adjective modifying 'resultados' (results), emphasizing the extreme quality of inadequacy of the results in a comparative context.

• No debemos olvidar lo que aprendimos de nuestros peores errores.

  We must not forget what we learned from our worst mistakes.

  Here, 'peores' is an adjective describing 'errores' (mistakes), referring to those that are considered most severe or significant in their negative impact.