Ateh
atah
“Unto Thee” in Liber O; “thou art” in the Golden Dawn's text.
Where the spelling and meaning come from (1)
Hebrew: אַתָּה canonical
The Golden Dawn glosses Ateh “thou art”, which is the Hebrew atah — the same word that opens the line AGLA abbreviates.
אַתָּה גִבּוֹר לְעוֹלָם אֲדֹנָי
ATEH (thou art)