Learn Russian: Когда водитель выругался, это принесло ему облегчение. - When the driver swore, it brought him relief.

The base verb ругаться means to swear or to curse. In Russian, combining the вы- prefix with the -ся ending often creates a meaning of doing an action to the point of saturation or getting it out of your system. So, выругался means he swore until he felt satisfied, which explains exactly why it brought him relief.

Could we use the imperfective ругался instead of выругался?

You could, but it changes the timeline. Когда водитель ругался... means 'While the driver was swearing...', focusing on the ongoing process. The perfective выругался emphasizes that the action of venting was fully completed, which then triggered the relief.

Why is the verb принесло in the neuter form?

In the second clause, the grammatical subject is это (this/it), which refers back to the entire first clause (the event of the driver swearing). Because это is a neuter pronoun, the past tense verb принесло must take the neuter ending -о.

How is the word облегчение built?