Flat9@BasePalm-PalmDown-FlatB@CenterChesthigh-PalmUp Flat9@InFinger-PalmDown-FlatB@CenterChesthigh

Etymology
Possibly imitative of adding a column of numbers up (upwards). Possibly imitative of moving beads on an abacus.

Production

 * Move the dominant hand forward while holding the nondominant hand in this posture.
 * Alternatively, both palms may face each other with the extended fingers of each hand pointing up. In this form, the dominant hand moves up instead of forward.
 * Alternatively, the dominant hand may contact the nondominant hand multiple times while it moves from base to tip.
 * Alternatively, both palms may face each other with the extended fingers of each hand pointing up. In this form, the dominant hand moves up instead of forward.
 * Alternatively, the dominant hand may contact the nondominant hand multiple times while it moves from base to tip.
 * Alternatively, the dominant hand may contact the nondominant hand multiple times while it moves from base to tip.


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Verb

 * 1) to count