Pictograph of a right hand seen from the side — the diagonal is the arm and the short stroke marks the fingers (originally three lines, contracted to two). Originally meant 'right hand', the proto-form of
右. The 'again, also' adverbial use developed by phonetic loan. The hand sense survives in
友 (friend),
取 (take),
受 (receive),
反 (turn over). Kangxi radical #29.