זָהַר zâhar (H2094)

to gleam; figuratively, to enlighten (by caution)

1) to admonish, warn, teach, shine, send out light, be light, be shining 1a) (Niphal) to be taught, be admonished 1b) (Hiphil) 1b1) to teach, warn 1b2) to shine, send out light (fig.)

a primitive root;