The first occurrence.
And that I also have walked contrary to them, and have brought them into the land of their enemies; if then their uncircumcised hearts are humbled, and they then accept the punishment of their iniquity … Lev 26:41
The primitive root.
Strong’s H3665 כנע kana, a primitive root meaning, “to be humble.” The 3-letter root is kaph + nun + ayin.
kaph כ ך = open palm, thus bend, open, allow, tame
nun נ ן = seed, thus continue, heir, son
ayin ע = eye, thus watch, know, shade
The story: The opening (kaph) of the seed (nun), thus, the going down of the root to provide a firm foundation for the plant above ground. The parable is the going down (kaph + nun) of the eye (ayin); to bow the head.