砺 礪 li4
grind; sandstone

strokes 10
radical
石
石
strokes after radical 5
砥砺 砥礪 di3 li4
whetstone; (fig.) to hone; to temper; to encourage

磨砺 磨礪 mo2 li4
to sharpen on grindstone; to improve oneself by practice

再接再砺 再接再礪 zai4 jie1 zai4 li4
variant of 再接再厲|再接再厉