Aronyu??

[Tirea Pa'li]

Noticed this last time. When Naytiri`s showing Seze to Jake, she tells him "To become a hunter - Aronyu you must chose your own ikran and he must chose you!" I`am 100% sure there was no "T". She said just aronyu. Is this possible?

[omängum fra'uti]

There is a T, it is just unaspirated as is proper for Na'vi "t" (And "p" and "k") consonants.  It doesn't have the same "pop" as it would in an English word spelled like that.

There's a work in progress beginners guide that covers the subject on the wiki.  Somewhat related, the same consonants are unreleased at the end of the word.

[Ftiafpi]

Yeah, the unaspirated 't' will border on sounding like a 'd'.