The Ankh • not only is a symbol of Life but the elements that create life. The MduNtr symbol for the sound N, which represents a Wave and then the Mdu Ntr symbol for the sound KH, which represents Matter. These are key elements of the symbol of the ANKH or NKH. Wave plus Matter, to our Ancestors, produces the elements of Life.

Amen, Nun, Kek, Heh
The letters here, chanted together, would be a word-sound. This word-sound can now be described as the Ankh.