Root of the עין family (9 members).

Primarily, the anatomical 'eye,' the organ of seeing; by extension, anything resembling or functioning as an 'eye' (such as a spring or well, seen as the 'eye' of the landscape); also metaphorically used for perception, attitude, viewpoint, or favor; occasionally denotes appearance, surface, or countenance; can indicate presence or the act of watching/observing; serves idiomatically in expressions of personal pronouns or points of view.