"bow"

[Rankin, Robert L]

>  So does this -xti ending also occur in other Siouan languages in this context?  So far I'd only found the D-S (Dorsey-Swanton) big or very gloss, but this 'real' gloss certainly makes more sense!
 
Yes, it's not uncommon to see it (or its analog, -xca) used in this way.  *ihta is the original term for 'deer' and forms the basis for the deer term in most of the languages.  But in at least some (maybe all) Dakotan dialects the reflex, tha, is also used famously in tha thaNka '(bull) buffalo', and the ordinary white tailed deer is referred to as tha xca 'real deer'.  I've never heard of it being used with the dog/horse pair, but -xti means 'real, true' pretty routinely as well as being an augmentative.  Bob