Metoro's expression mea ke seems to mean 'something (mea) different' (ké).

1. The triplet of broken lines at the top end of mea ke glyphs suggests the end of a season, similar to how in the Mamari moon calendar full moon is depicted  with another kind of broken line at the bottom end:

Ca7-24

At full moon the season of waxing moon ends, and the mirror image of growth - waning - will follow.

Likewise, the nadir phase (so to say) can be illustrated by a 'broken branch'. Nadir has been reached by way of a season of waxing darkness and then will follow a season of decreasing (waning) darkness: