Meaning and usage guide
inter- vs intra-
Meaning, usage, pronunciation, and examples
Inter- means between or among separate groups, places, or things. Intra- means within a single group, place, or thing.
Reference accent
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How to choose
Draw the boundary before choosing the prefix
Ask whether the action crosses from one unit to another or remains inside one unit.
Between units: inter-
Use inter- for connections, actions, or comparisons between separate groups or entities.
Interdepartmental work connects two or more departments.
Within one unit: intra-
Use intra- for something happening inside the limits of one group or entity.
Intradepartmental training stays within one department.
Established vocabulary
Many compounds are written without a hyphen. Use a dictionary for the accepted spelling and stress pattern.
Internet is established, while an intranet is a private internal network.
Direct answer
What is the difference?
The prefixes set the boundary of a relationship. International concerns two or more nations; intranational stays within one nation. Interpersonal happens between people; intrapersonal happens within one person. The spelling after the prefix may change with established words, so check a dictionary before creating a new compound.
American English
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Word 1
inter-
prefix
Between, among, or involving two or more separate things or groups.
US pronunciation
/ˈɪntər/
UK IPA
/ˈɪntə/
Hear three samples
How to pronounce it
When said alone, stress IN and pronounce a clear T. Stress can shift inside a complete word.
Word 2
intra-
prefix
Within or on the inside of one thing, place, or group.
US pronunciation
/ˈɪntrə/
UK IPA
/ˈɪntrə/
Hear three samples
How to pronounce it
Stress IN, keep the NTR cluster compact, and reduce the final vowel to a light “uh.”
Listen in context
6 example sentences
Context makes meaning, grammar, and natural rhythm easier to understand. Every sentence has its own playback.
Examples with
inter-
- The prefix inter- means between separate groups.
- Use inter- in international for relations between nations.
- An inter-agency team includes people from multiple agencies.
Examples with
intra-
- The prefix intra- means within one group.
- Use intra- in intranet for a network within an organization.
- An intra-company transfer stays inside the same company.
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