PIE *Heh3s "birch tree/ash tree" is the source of Proto-Germanic *asko meaning "ash, ahes" as in that which fire leaves behind

In addition to what the title says, I describe the root meanings of PIE *heh3s and the PIE roots that it is a variant of. In this second edition uploaded almost two hours later, I describe that the "ash" meaning could have come mainly from the white bark of the birch tree, since PIE *heh3s likely originally meant "birch tree".