Kitten's sound can be described by three words: mewing (6 letters), PURR (4 letters), and MEW (3 letters). Mewing is a high-pitched, plaintive sound that kittens make when they are hungry or in distress. Purring is a low, continuous sound that kittens make when they are content or happy. Mewing is a short, soft sound that kittens make when they are communicating with their mother or other cats. All of these sounds are unique to kittens and help them express their needs and emotions.