Comparative form of beady; more beady; more resembling beads in appearance.
From beady (bead + -y adjective suffix) + -er (comparative suffix). This comparative form allows gradation of the quality of being bead-like.
Using comparative forms like 'beadier' shows how English lets us shade meanings—'beady eyes' is suspicious, but 'beadier eyes' cranks up the intensity and focus of that watchfulness even more.
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