In mechanical systems, friction between friction pairs (FPs) contributes to approximately 23 % of global energy losses while accelerating component wear, shortening equipment lifespan, and posing significant safety risks. However, the balance between self-repairability and   performance degradation   caused by lubricant loss remains a major challenge for FPs. Inspired by sweat streaming, a novel and simple strategy involving the pre-embedding of solvent-free nanofluids (SNFs) into rigid polymers is proposed to fabricate thermally responsive, lubricating, and functionalized friction pairs. Experiments and theory reveal an outstanding friction coefficient and self-replenishment of FPs driven by thermal and shear fields due to Brownian motion. Meanwhile, these self-complementary behaviors were regulated by the environment temperatures change. Moreover, the correlation between the enrichment degree of SNFs, dielectric constant characteristics of the FPs contact interface, and the triboelectric output characteristics is established guiding strategy as lubricant content probe and an energy recovery device by contact electrification effects. Combining these advantages with the hydrophilicity of SNFs, a series of optical FPs exhibit unrivaled anti-fogging properties in extreme environments and real-world scenarios. This method also shows promise for solving durability, energy loss, and functionalization challenges in mechanical systems.