From quwm; properly, standing (extant), i.e. By implication, a living thing -- (living) substance.
see HEBREW quwm
H3351. yequm
יְקוּם noun [masculine] substance, existence הַיְקוּם כָּלֿ = all that subsists Genesis 7:4, 23 (man and animal), in more limited sense Deuteronomy 11:6.