So, prelim. search:
In
Halq'eméylem, the language of the
Stó:lō communities around Chilliwack and Sardis,
chilliwack means "as far upriver as you can go before having to switch to a pole." It also lends its name to the
Chilliwack River, and group of aboriginal people, the Ts’elxweyeqw.
[1] The spelling of Chilliwack is sometimes a matter of confusion. Prior to the amalgamation of the City of Chilliwack and the Municipality of Chilliwhack, there were two different spellings. Upon amalgamation, the current spelling of the city was adopted.
[2] Anglicized spellings include "Chilliwhyeuk" and other versions closer to the original
Halq'eméylem
Further etymological analysis is going to be required, to dissemble and reassemble this correctly.
(Don't look at me, if it can't be done with power tools, I'm out.)