συγκαταψηφίζω

with or together (but much closer than G3326 (μετά) or G3844 (παρά)), i.e. by association, companionship, process, resemblance, possession, instrument...

(prepositionally) down (in place or time), in varied relations (according to the case (genitive, dative or accusative) with which it is joined)

to use pebbles in enumeration, i.e. (generally) to compute