ḫu is not ‘luminous’ but ‘clear, distinct, glittering, ‘coruscans,’ and hence ‘bright, splendid, illustrious, glorious,’ and the like. Like the Greek λαμπρός, the Latin clarus, the Hebrew עהל, or the French éclat, it is applied to sound as well as to light. It is said of Thoth (in the wretched orthography[[5]] of a tablet of the XIXth dynasty)
