The word 排斥 is formed through the conceptual combination of its two component characters: 排, which conveys the idea of pushing away or arranging to exclude, and 斥, which carries the sense of repelling or rejecting. Together, they create a compounded meaning where 排 actively enacts the removal or dismissal, and 斥 intensifies this with a notion of forceful repulsion, resulting in the unified concept of exclusion or rejection. This formation relies on the synergistic reinforcement of both characters to express the act of ostracizing or keeping something at a distance.