Experiments carried out in recent times employing MHz-GHz frequency window have repeatedly shown substantial decrease in the value of the static dielectric constant (𝜀 𝑠 ) of neat molten acetamide in DESs made of acetamide and uni-univalent electrolytes. This electrolyte-induced decrease of 𝜀 𝑠 or dielectric decrement is in sharp contrast to earlier reports based on KHz-MHz measurements and thus warrants a closer scrutiny. Temperaturedependent simulated 𝜀 𝑠 values for the three ionic acetamide DESs are shown via a bar chart in Fig. along with that for the neat molten acetamide. Clearly, 𝜀 𝑠 values for the ionic acetamide DESs investigated are considerably lower than that of the neat molten acetamide, and shows dependence on both temperature and anion-identity. The phenomenon of the ion-induced dielectric decrement is, however, not new and has already been observed for conventional ionic solutions in both experiments and simulations. Traditionally, this has been explained considering two different scenarios. In the dynamic picture, solvent molecules in the first solvation shell are assumed to electrostatically bind with ions in solutions so comprehensively that those solvent molecules lose their orientational freedom and remain non-responsive to the frequency dependent electric field administered during DR measurements. This makes these bound solvent molecules to appear as rotationally frozen and cannot contribute to the frequency dependent dielectric function. The resultant decrease in 𝜀 𝑠 is then termed as the kinetic dielectric decrement. FIG. Temperature-dependent static dielectric constant for three DESs. 𝜀 𝑠 for liquid acetamide at 358 K is also shown for comparison. Each plot is color-coded.