| a prefix occurring in loanwords from Latin, where it meant “between,” “among,” “in the midst of,” “mutually,” “reciprocally,” “together,” “during” (intercept; interest); on this model, used in the formation of compound words (intercom; interdepartmental). |

| inter- pref.
[Middle English entre-, inter-, from Old French entre-, from Latin inter-, from inter; see en in Indo-European roots.] |
inter- pref.
Between; among: interdental.
In the midst of; within: interoceptor.