Where does “dats'ena” come from?

dats'ena (Lower Tanana) comes from Lower Tanana -ts'ena', from Lower Tanana ts'en', from Proto-Athabaskan *tsʼənʔ — to, toward.

Ancestry of “dats'ena”, step by step

StepLanguageWordMeaning
1Lower Tanana-ts'ena'(on the) side of, next to
2Lower Tananats'en'to, toward
3Proto-Athabaskan*tsʼənʔto, toward
Every word from Proto-Athabaskan *tsʼənʔ →Every word from Lower Tanana -ts'ena' →Every word from Lower Tanana ts'en' →