I realize that my earlier ideas about GD26 might need to be changed radically. I had created a preliminary item for my glyph dictionary, but it must go to the waste basket. However, there might be some value in it and therefore I first document it here.
In Bierbach it is convincingly demonstrated that ákuáku and some other words for 'spiritual' concepts on Easter Island ultimately derive from ideas connected with the embalming of dead people. I am updating my Polynesian dictionary with a summary of these findings and as an illustrative example choose ákuáku.
We should distinguish between 'spirit' as 'soul' and 'spirit' as 'ghost':