Question

@Vincent-Lyon.Fr @terenzreignz https://en.wiktionary.org/wiki/erl%C3%B6sen#Conjugation

Why not geerlöset?

Answer 1

Regular verbs form their pp this way:

MACHen -> ge-MACH-t (to make, to do)

where the capitalised part is the root of the verb.

Now such regular verbs can form new ones by adding a particle.
AUFmachen - > to open
ZUmachen -> to close
Such particles are of two types: the stressed ones and the unstressed ones.

The stressed one are detachable in sentences and sent back to the end of the sentence.
Ich mache die Tür auf. (I open the door)
The pp is formed this way: auf-gemacht
you can see that the particle is once again separated from the verb root (by 'ge')

The unstressed particles cannot be separated and stay as such with the verb root.
vermachen
Ich vermache dir mein Haus. I pass down my house on to you.
The pp is formed without the 'ge' in the beginning: vermacht
Ich habe dir mein Haus vermacht.

lösen (to solve) is regular -> gelöst
erlösen (to deliver) has a weak particle, so no 'ge' and goes 'erlöst'.

Answer 2

Ich dir dankbar bin :D

Answer 3

http://german.about.com/od/vocabulary/a/ausmachen.htm
wow so many meanings

Answer 4

Wow machen can form so many verbs:
aufmachen
zumachen
ausmachen
anmachen
....