Keeping a safe emotional or physical distance from someone or something.
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To keep a safe distance from someone, in feeling or in space.
When you keep someone at arm's length, you deal with them but never get close.
It is often used when a person is guarding themselves from getting too involved.
"Keep at Bay"
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Actively preventing something from getting closer or causing harm
"Give the Cold Shoulder"
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Deliberately ignoring or being unfriendly to someone as a sign of displeasure
"Keep Something or Someone at Arm's Length"
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Maintaining a careful distance from someone while still having some interaction