This is a strange noun form. Perhaps this is misrecording for łę́nemą?. The stem of the noun is łę́- as evidenced by its appearance in a compound. This would mean that the -newą could be a suffix or stem, which happens to look very similar to the inverse inflectional suffix -nemą.
But maybe it's exceptional. Ishwar 05:27, 16 November 2008 (UTC)