潜水刀 Traditional form: 潛水刀 Pinyin (reading): qiánshuǐdāo Definitions: dive knife Characters: 潜 - to hide; secret, latent, hidden 水 - water, liquid, lotion, juice 刀 - knife; old coin; measure Traditional characters: 潛 - to hide; secret, latent, hidden 水 - water, liquid, lotion, juice 刀 - knife; old coin; measure