leaven 4682 ## matstsah {mats-tsaw'}; from 4711 in the sense of greedily devouring for sweetness; properly, sweetness; concretely, sweet (i.e. not soured or bittered with yeast); specifically, an unfermented cake or loaf, or (elliptically) the festival of Passover (because no leaven was then used): -- unleaved (bread, cake), without {leaven}.
leaven 7603 ## s@&or {seh-ore'}; from 7604; barm or yeast-cake (as swelling by fermentation): -- {leaven}.