The word 救援 is formed through the logical combination of two characters, each contributing a crucial aspect to the overall concept. The first character, 救 (jiù), carries the core meaning of "to save", "to rescue", or "to relieve". It is paired with the second character, 援 (yuán), which means "to aid", "to support", or "to pull". Together, they create a synergistic meaning where 救 provides the primary action of saving from danger, and 援 amplifies it with the sense of extending help, assistance, or reinforcements. Thus, the formation encapsulates the complete idea of a saving action that is fundamentally an act of giving aid, most commonly understood as "relief" or "rescue" in urgent contexts.