油灰刀 Traditional form: 油灰刀 Pinyin (reading): yóuhuīdāo Definitions: putty knife Characters: 油 - oil, fat, grease, lard; oil paints 灰 - ashes; dust; lime, mortar 刀 - knife; old coin; measure Traditional characters: 油 - oil, fat, grease, lard; oil paints 灰 - ashes; dust; lime, mortar 刀 - knife; old coin; measure