Tattooed is the past form of 'tattoo', to put a permanent picture or word into someone's skin with a needle and ink. Because the ink goes under the skin, it does not wash off — that permanence is the whole meaning of the word. You meet it three ways. As a verb: 'he tattooed a small bird on her wrist'. As a description of a person: 'a heavily tattooed man' — meaning covered in tattoos. And as a description of the skin or body part: 'her tattooed arms'. English also uses it for something fixed forever in the mind: 'that day is tattooed on my memory'. In Taiwan a tattoo can still be read as a mark of gangs, but among young people worldwide it is now ordinary decoration, and a good teacher should not assume the old reading.