And God saw the light, that it was good; and God divided the light from the darkness. Gen 1:4
The primitive root
tet ט = the basket, thus surround, contain, hold, mud
vav ו = the tent peg, thus add, secure, hook
bet ב = the house, thus house, household, family, in, within
The story being told is of the enclosure (tet) joined (vav) with its contents (bet in the sense of within, as a basket holds whatever it contains). “Good” means the exact opposite of “void:” instead of the enclosure being empty, it is instead filled with its contents.