勉 means utmost effort and is a JLPT N4 kanji. It has 10 strokes and uses the strength radical (力).
Stroke order · 10 strokes
On'yomi (音読み)
ベン
Kun'yomi (訓読み)
つと(める)
Radical
力 · strength
Strokes
10
How to remember 勉
免 + 力 (strength): pouring all your body's strength into something. 勉強 (benkyou) = studying — both kanji together say: force + strictness. The Japanese knew studying never comes easily.