The word "欢呼雀跃" is formed by combining two two-character phrases: "欢呼", meaning to cheer or shout with joy, and "雀跃", meaning to jump or leap like a sparrow. Together, they create a compound idiom that depicts enthusiastic celebration through both audible shouts and physical jumps, using the metaphor of sparrows' lively movements to emphasize the vigor of the joy expressed.