KanjiJLPT N1
Rectify

rectify, straighten, correct, reform, cure, control, pretend, falsify

Mnemonic

An arrow heading toward the tower is wildly off course—bent and wobbling mid-flight. You snatch it from the air and rectify its crooked shaft by pressing it flat against the tower wall, straightening it with a loud CRACK. You fire again; the rectified arrow flies true, piercing the tower's bullseye dead center.
Additional thoughts
Picture physically bending a warped arrow straight against cold stone tower walls. The satisfying crack of correction locks in the meaning: deliberate force applied to fix what went crooked.
Quick recall
A bent arrow is straightened against the tower wall to rectify its flight.

Details

The keyword for 矯 is rectify. This kanji conveys the idea of correcting something that is crooked, bent, or deviant, bringing it back into proper alignment or form. It can refer to straightening physical objects as well as reforming behavior, attitudes, or habits that have gone astray. The underlying sense is one of applying deliberate effort or force to fix what has become distorted or improper.
On'yomi
きょう
Kun'yomi
た.める

Used in vocab