regn

In a sentence

• Regnet öste ner hela kvällen.

  The rain poured down the entire evening.

  Here, 'regnet' refers to the rainfall itself as a natural phenomenon, used as a noun in the definite form.

• Under semestern träffade vi på regn varje dag.

  During the vacation, we encountered rain every day.

  In this context, 'regn' is used to describe rain in an indefinite and general sense.

• Om det börjar regna imorgon, tar vi bilen istället.

  If it starts raining tomorrow, we'll take the car instead.

  Here, 'regna' is the verb form derived from 'regn', indicating the action of raining.