Fausset's Bible Dictionary
(Genesis 41:43). Translated "bow the knee" in English Bible. Others translate "a pontifical," or "pure prince," a common title in ancient Egyptian tombs; Origen and Jerome, "a native Egyptian." Thus Abrech will be a proclamation of Joseph's naturalization, a requisite for his executing successfully his great, undertaking among a people most jealous of foreigners. Canon Cook (Speaker's Commentary) makes it imperative, from the Egyptian," Rejoice thou;" but Harkevy understands it as Αp-Rach , "Chief of the Rech", or "men of learning."
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Fausset, Andrew R. Entry for 'Abrech'. Fausset's Bible Dictionary. https://www.studylight.org/dictionaries/eng/fbd/a/abrech.html. 1949.