The word "吼叫" is a typical example of a Chinese compound formed through synonym pairing, where two characters with similar meanings are combined to reinforce and specify a concept. The first character, "吼" (hǒu), specifically means to roar, howl, or bellow, often associated with animals like tigers or lions. The second character, "叫" (jiào), has a broader meaning of to call, shout, or yell. When combined into the disyllabic word "吼叫," the meaning converges on a forceful, loud, and often angry or bestial vocalization, blending the intense, roaring quality of "吼" with the vocal act denoted by "叫" to create a more vivid and emphatic term than either character alone.