Kitten's cry is a term used to describe the sound made by a young cat. The three most common words used to describe this sound are MEW (3 letters), MEWL (4 letters) and MEOW (4 letters). MEW is a short, high-pitched sound, while MEWL is a longer, more drawn out version of the same sound. MEOW is a slightly louder and more emphatic version of the sound. All three words are used to describe the sound made by a kitten.