I just realized, there is something I don't know with regards to the {rIntaH}..

Is it only to be used with regards to action which happened intentionally ?

I know we can say:

{vIghro' vIje' rIntaH}

I bought a cat

But if we say:

{muD Dotlh bIrmo' taD rIntaH vIghro'}

because of the cold weather the cat froze

Would it be correct ?

rIntaH works the same as -ta', except with an added connotation of finality. Intention is part of the meaning.

-- 
SuStel
http://trimboli.name