The word "largescale" implies something big, extensive or magnanimous. Its antonyms, on the other hand, signify something small, limited, or even insignificant. Words like "small", "minuscule", "tiny", and "microscopic" are among the opposite or antithesis of largescale, denoting something miniature or a tiny proportion. Terms like "limited", "narrow", "restricted", "pocket-size", and "insignificant" also articulate a sense of diminutive scale, signifying something minute or of minimal importance. In conclusion, antonyms of largescale can be used in specific contexts to denote size, impact or significance of different issues, scenarios or products.