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Inter-, intra-

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  • The prefix inter means between or among. The prefix intra- means within. For example, an interstate highway is one that goes between or among states, while an intrastate highway is one that exists only within a single state.

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    Intra- and inter- can be attached to any common noun without a hyphen—although, as the below examples show, many writers aren’t comfortable doing so. Your spell check might catch your unhyphenated inter-/intra- coinages, but spell check would be wrong.

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