bèi
to strop, to sharpen by rubbing against leather, stone, etc.
to sharpen (a knife) on a stone or a strop; Taiwan pr. [bi4]
Pictophonetic: semantic 金 (metal), phonetic 辟
Made of 辟 + 金
被备贝杯背北辈悲倍卑呗碑惫蓓狈悖焙