The word "猖獗" is formed by combining two characters, each containing the "犭" (dog) radical, which semantically suggests wild or animal-like behavior. The character "猖" incorporates "昌" primarily for its phonetic sound (chāng), while "獗" incorporates "厥" for its phonetic sound (jué). Together, these components create a disyllabic word where the radicals contribute to the meaning of unruly or rampant, and the phonetic elements indicate pronunciation.