Under the Skin is a phrase that refers to something that lies beneath the surface, often in a figurative sense. It can refer to a person's true feelings or intentions, or to a hidden layer of meaning in a work of art. The term 'subcutaneous' is related to this phrase, as it refers to something that lies beneath the skin, usually referring to a layer of fat or tissue. Subcutaneous is a 12-letter word, and it is often used in medical contexts to describe a layer of tissue that lies beneath the skin.