戒刀

戒刀	jiè dāo	Buddhist monk's knife (not used for killing)
戒	jiè	to guard against / to exhort / to admonish or warn / to give up or stop doing sth / Buddhist monastic discipline / ring (for a finger)
刀	Dāo	surname Dao
刀	dāo	knife; blade; single-edged sword; cutlass (CL:把) / (slang) (loanword) dollar / classifier for sets of one hundred sheets (of paper) / classifier for knife cuts or stabs / (Internet slang) to bargain; to ask for a small discount (esp. on second-hand marketplaces)