nudne

In a sentence

• Lekcja była nudna i trudno było się skupić.

  The lesson was boring and it was hard to concentrate.

  Here, 'nudna' (a declined form of 'nudne') is used as an adjective describing the feminine noun 'lekcja.' It indicates that the lesson was uninteresting.

• Te filmy są nudne; wolę coś bardziej ekscytującego.

  These movies are boring; I prefer something more exciting.

  In this instance, 'nudne' functions as an adjective describing the plural noun 'filmy' (movies), showing that the movies are uninteresting.

• Nie lubię nudnych zajęć, ponieważ tracę wtedy czas.

  I don't like boring activities because I feel like I waste time.

  Here, 'nudnych' (a declined form of 'nudne') modifies the plural noun 'zajęć' (activities), emphasizing the uninteresting nature of such activities.