[ὀφρῦς] perhaps from G3700 (through the idea of the shading or proximity to the organ of vision); the eye-"brow" or forehead, i.e. (figuratively) the brink of a precipice
Usages throughout the bible
Luke 4:29
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And rose up, and thrust him out of the city, and led him unto the brow G3790 of the hill whereon their city was built, that they might cast him down headlong.