徹
テツ, あき, つ, てっ, とおる

penetrate, clear, pierce, strike home, sit up (all night)

JLPT1 G7 S15 F968

The right-hand element# is as per 育 (pass through) + 攵 action indicator → pass through. 徹 adds 彳 movement/action indicator (for further emphasis/clarification) → *go/slip through* → *pierce*; *penetrate*.

[Full Kanji Etymology List]