A pair is two things that are used together or are seen as a set, or two people or animals that are together.
From Old French *paire* “a pair,” from Latin *paria* “equals,” from *par* “equal.” It originally emphasized two equal or matching parts.
A pair is more than just ‘two’; it’s two that belong together—like shoes, chopsticks, or dance partners. English even treats some pairs as one unit: you say “a pair of scissors” even though it looks like one object.
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