pleased, delighted, happy
訢 centers on a feeling of joyful satisfaction: being pleased, delighted, or happy about something.
訢 combines 言 (speech, words) with 斤, which likely contributes the sound. The idea of joyful speech or expressing happiness through words is suggested by the components.
Words (言) spoken with the weight of an axe (斤) might seem harsh, but here they are joyful words that cut through gloom, leaving you pleased and delighted.
For キン, imagine a king (キン) who is so pleased with your words that he rewards you: king -> キン, and his happy reaction matches the meaning of 訢.