שָׁלַשׁ

shâlash. a primitive root perhaps originally to intensify, i.e. treble; but apparently used only as denominative from שָׁלוֹשׁ,; to be (causatively, make) triplicate (by restoration, in portions, strands, days or years); do the third time, (divide into, stay) three (days, -fold, parts, years old).