Perhaps from G3700 (through the idea of the shading or proximity to the organ of vision); the eye brow or {forehead} that {is} (figuratively) the brink of a precipice: - brow.
Act 5:16There came also a multitude out of the cities round about unto Jerusalem, bringing sick folks, and themG3791 which were vexedG3791 with unclean spirits: and they were healed every one.