Questions & Answers about Mi koleras pro via mensogo.
Because Esperanto often uses a verb where English uses to be + adjective.
- koleri = to be angry
- kolera = angry (an adjective)
So Mi koleras is a very natural Esperanto sentence.
You can also say Mi estas kolera, and it is not wrong. The difference is mainly stylistic:
- Mi koleras = I am angry
- Mi estas kolera = I am angry / I am in an angry state
In normal conversation, Mi koleras sounds very straightforward and idiomatic.
Pro means because of, due to, or on account of.
In this sentence, it introduces the cause of the anger:
- Mi koleras pro via mensogo = I am angry because of your lie.
This is different from prepositions like:
- pri = about, concerning
- kontraŭ = against
- kun = with
So pro is the right choice when you want to show the reason something happens.