訓
クン, キン, おし.える, よ.む, くん.ずる, く, くに, くの, さとし, のり, ふみ

instruction, Japanese character reading, explanation, read

JLPT2 G4 S10 F1134

As per 川# (bore through) + 言 words → (a) *teaching* (← words that allow one to bore through a difficult problem) → *interpret*; *KUN reading* of a Han/Chinese character (← grasp the signification of a character ← comprehend in learning; the contrast is to 音, where the idea is to read a character for its sound).

[Full Kanji Etymology List]