proto
therefore, that's why
Proč? Proto!
Why? Because!
Tak proto! (aha)
So that's why!
No proto! (tak se mi to líbí)
That's the way I like it., Well you'd better!
Proto ho nemám rád.
That's why I don't like him.
Právě proto, že mu nic jiného nezbývá.
Just because he has no other option.
Dostal co proto!
He got the treatment.
Já mu dám co proto!
I'll sort him out!, I'll give him what for!