砥 砥 di3
baffle (pier); whetstone

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

中流砥柱 中流砥柱 zhong1 liu2 di3 zhu4
mainstay; cornerstone; tower of strength