The word 反感 is formed through the direct conceptual fusion of its two component characters: 反 (fǎn), meaning to oppose, resist, or be against, and 感 (gǎn), meaning feeling or sensation. It is not merely a sum of "oppose" plus "feeling", but rather a synthesis where the character 反 actively modifies and characterizes the nature of the 感, resulting in the integrated meaning of a "feeling of opposition", an instinctive, negative emotional reaction of dislike or repulsion toward something. This formation visually and conceptually depicts an inward sentiment that is fundamentally one of rejection.