Looked carefully or with difficulty at something, especially when trying to see something far away or in dim light.
From Middle English 'peren,' possibly related to 'pure' or 'appear'; meaning evolved from suggesting a straining or staring motion to mean careful, intent looking.
When astronomers 'peered' through early telescopes, they discovered moons around Jupiter that nobody knew existed—changing everything we thought about our place in the universe.
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