< Radical
Radical 18 is "blade", 刀 or 刁, or most commonly 刂 on the right hand side.
+1 Stroke
刃 , 刄-->刃
+2 Strokes
分, 切 , 刈
+3 Strokes
刊 , 刍-->芻
+4 Strokes
刑
+5 Strokes
初 , 別 , 利 , 刪
+6 Strokes
刮 , 到 , 制 , 刷 , 刹 , 刺 , 刻
+7 Strokes
剃 , 則 , 削 , 剌 , 前
+8 Strokes
剖 , 剛 , 剝 , 剣 , 剤
+9 Strokes
剪 , 剰
+10 Strokes
割 , 創
+13 Strokes
劉