What are the opposite words for periphery?

Periphery refers to the outer limit or edge of something. Its antonyms are center, core, and middle. The center refers to the point that is equidistant from all surrounding points. It is the main or focal point of a certain area. The core is the central, innermost, or essential part of something. It represents the heart or center of a system or organization. The middle, on the other hand, pertains to the point or position away from the extremes or edges. It may signify the midpoint or a position that is neither too extreme nor too bland. When used in contrast with Periphery, these antonyms help describe the position, significance, and importance of a certain object or phenomenon.

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