Macroseisms refer to large or grandiose concepts, ideas, or things. The antonyms for macroseisms would, therefore, be small-scale, modest, or humble. The opposite of grand or bigger than life would be diminutive or small. For example, if macroseisms refer to large policies, then antonyms could include modest, conservative, or incremental. Similarly, if macroseisms relate to representations of power, then antonyms could be meek or powerless. Whatever the context, the antonyms for macroseisms are typically terms that denote the opposite or absence of grandiosity or extravagance, and suggest modest or run-of-the-mill characteristics or attributes.