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We report a high-pressure 75As NMR study on the heavily hole-doped iron pnictide superconductor KFe2As2(Tc~3.8 K).The low energy spin fluctuations are found to decrease with applied pressure up to 2 GPa,but then increase again,changing in lockstep with the pressure-induced evolution of Tc.Above 2.42 GPa,the 75As satellite spectra below 40K,indicating a breaking of local C4 symmetry at As site.