LATIN DICTIONARYLexicon Latīnum
adverb

inter sē

inter sē (not comparable)
Classical[ɪnˈtɛr.seː]Ecclesiastical[in.terˈsɛː]

Meaning

  1. not comparablereciprocalthird person(with, among etc.) one another, each other; together, mutually
    inter sē amāreto be very fond of one another
    inter sē cōnsentīreto feel the same way, to agree among oneselves

Origins

From inter (“between”) + sē (“reflexive pronoun”, acc).

Quick answers

What does inter sē mean in Latin?
inter sē, a adverb, means “(with, among etc.) one another, each other; together, mutually”.
How do you pronounce inter sē?
In classical Latin, [ɪnˈtɛr.seː]; in ecclesiastical (church) Latin, [in.terˈsɛː].