The prefixes infra-, inter-, and in- have distinct meanings related to spatial relationships and positioning.
Infra- means below or beneath. An example using this prefix would be 'infrared,' which means situated or occurring below the visible spectrum of light.
Inter- means between. A word using this prefix is 'interact,' which means to act between or reciprocally among objects or people.
In- means in or into. An example is 'involve,' which means to engage or occupy fully or partially.
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