just wondering

[Torture Killer]

i'm just wonderin' that, is " 'iam'aei " ('i<am>'a<ei>, translated ended (+laudative)) right?+ 

[Muzer]

The infixes are in the wrong place - they come before the vowel.

[omängum fra'uti]

'ami'eia could be "ended" or "was ending" depending on context.  'oli'eia could also be "ended" or "ends" or some other things not well expressed in English.  in both cases lauditive.

[kewnya txamew'itan]

i'm just wonderin' that, is " 'iam'aei " ('i<am>'a<ei>, translated ended (+laudative)) right?+ 

Moving the infixes to their correct places ('ami'eia) then yes. Depending on the sentence as a whole, <ol> might be more appropriate than <am> though for ended.

[Torture Killer]

hmm?
im -again- so confused O.o

[kewnya txamew'itan]

Infixes (<am> and <ei>) go before the vowel so 'iam'aei is wrong, it should be 'ami'eia for which your translation is pretty much spot on without the context.

If on the other hand you're actually going from English to na'vi then, depending on the context, <ol> might be a better way of expressing it instead of <am> but we'd have to see the broader context.