The word "反复" is formed through the semantic combination of its two constituent characters: "反", which carries the core meaning of turning over, reversing, or being opposite, and "复", which fundamentally means to return, repeat, or revert. Their formation is not grammatical but conceptual, creating a compound where the idea of "turning over" is merged with the idea of "coming back again". This fusion visually and logically constructs the overarching sense of a cyclical, back-and-forth motion or action, inherently conveying the meaning of doing something again and again, oscillating, or reiterating.