油灰刀

putty knife

oil / fat / grease / petroleum / to apply tung oil, paint or varnish / oily / greasy / glib / cunning

ash / dust / lime / gray / discouraged; dejected

knife / blade / single-edged sword / cutlass / CL:把[ba3] / (slang) dollar (loanword) / classifier for sets of one hundred sheets (of paper) / classifier for knife cuts or stabs