Correct spelling, explanation: inter and intra are both correct prefixes in English, but they have different meanings and are used in different contexts. The first one means between or among. It is used when referring to relationships, interactions, or activities that occur between or among different entities or groups. The second one means within or inside. It is used when referring to relationships, interactions, or activities that occur within a single entity or group. The choice between inter and intra depends on the specific meaning you want to convey in your communication.

Definition of inter:
prefix, used to form adjectives meaning between or among the people, things, or places mentioned
The intercontinental flight from New York to London covered a vast distance across the Atlantic Ocean.
The conference aimed to promote intercultural understanding by bringing together people from diverse backgrounds.

Collocations with :
Some most commonly used collocations include:
1. Interact: to engage with or communicate with others.
Students are encouraged to interact with their peers during group projects.
2. Interconnected: having multiple connections or relationships with each other.
The interconnections between various parts of the ecosystem are complex and delicate.
3. Interdisciplinary: involving or combining multiple academic or professional disciplines.
The research project takes an interdisciplinary approach, combining elements of biology, chemistry, and engineering.
4. Interference: the act of hindering or obstructing something.
The radio signal was affected by interference from nearby electronic devices.

Correct spelling, explanation: the choice between inter and intra as a prefix in a sentence depends on the specific meaning you want to convey. Use inter- when you want to indicate relationships, interactions, or activities that occur between or among different entities or groups. Use intra- if you want to indicate relationships, interactions, or activities that occur within a single entity or group. It signifies something happening within one thing.