πλήρωμα [3 verses](noun sg neut nom/acc) "That which is put in to ...up" is pleroma, which means "that which fills," "fullness," "reserves," "mass," "complex," "filling up," "completing," and "fulfillment." -- "That which is put in to ...up is a noun that captures various ideas of filling and completing, but here, we might simply say "the filler.