pride, respect
矜 centers on a dignified sense of self-worth: pride in oneself and the respect that pride commands from others.
矜 combines 矛 (spear) and 今, which likely contributes the sound. The exact historical development is uncertain, but the character is associated with pride and self-respect.
Imagine a warrior holding a spear (矛) and standing tall with pride, commanding respect. The right side 今 can be seen as a person standing straight, reinforcing the dignified posture.
For キン, picture a proud king holding a spear: king -> キン, and his pride is as sharp as the spear.