A Sindarin word for “between” (VT47/11). Tolkien contrasted it with Q. enel by saying:

It differed from C.E. imbi and mīni (both probably derivatives of MI “in”) in that enel referred to the position of a thing between others of like kind, whereas imbi (Q. imbe) and mīni (S. mîn, min-) referred to a gap, space, barrier, or anything intervening between two other things (like or unlike one another).

The prefixal use of min- can be seen in S. Minhiriath “Between the Rivers” (LotR/1040; UT/261).

Neo-Sindarin: When I first created this entry, I misinterpreted the above description and assumed mîn was actually noun meaning a “gap, space, barrier, or anything intervening between two other things”. As such I accidentally created a neologism. This is a moderately useful neologism, however, so for purposes of Neo-Sindarin I would use mîn as preposition, prefix and noun for between, between-, and “a between [thing or place]”. For a pure preposition, see im².