If this analysis was workable, then maybe “study” could be borrowed similarly. In fact, “study” would be a better potential borrowing because it more closely fits Tlingit phonemics. So perhaps yéi kḵwastádi “I will study”, broken down as yéi-ga-u-ḡa-x̱a-s-tádi |THUS-GA-IRR-GHA-1SG.ERG-CL[−D,s,−I]-study|. I’ll have to run it by a native speaker to see if they like it.
It could be however that I’m abusing the S classifier, and that things like aduspelled have unproductive paradigms. Something more for the fieldwork questions pile.