The story
From medieval Latin, from Arabic هيلاج (haylāj), from Middle-Persian ŠḆKWN-k' (hilag, “releaser”), a calque of Ancient Greek ἀφέτης (aphétēs).
Etymology from Wiktionary, CC BY-SA 4.0.
hyleg
Today it means: In Hellenistic astrology, the planet with the greatest essential dignity in five important natal chart positions: the degree of the Sun; the degree of the Moon; the Ascendant; the Lot of Fortune; and the prenatal syzygy (that is, New Moon or Full Moon, whichever most closely preceded the birth). Full definition →