As in "beat" or "whip" eggs, or mix up something such as sugar so that it dissolves in water.
This version sounds like it has a shwa (e), in Mesa Grande dictionary spelled shuuhwar (shetehwaar).
Same form as Barona shuuhwar "scrapes something", variant of chehwar (chechehwaar).
Also found in Tiipay: shuuhwaarr "stirs it"