Indo-European poetry and myth

In the citing paper

“Furthermore, if we set aside this apparent distancing from the original meaning and focus on the literal meaning 'immortal, eternal', none of the phrases mentioned above (ambrosial hair, sandals etc.) can carry the meaning 'of non-dying' in the sense of 'which grants non-dying', as West suggests for the phrases ἄμβροτον / ἀμβρόσιον εἶδαρ ('food of non-dying').”

In the citing paper

“If its origin is indeed linked to the idea of undying, the adjective νεκτάρεος exhibits a similar process of detachment from the original meaning, as νεκτάρεος signifies 'nectarous' or 'fragrant'.”