An adjective appearing as {ened >>} entya “central, middle” in notes from the late 1960s, derived from primitive ✶enetya since in this note Tolkien was considered revising its root to √HENET (VT41/16).
Neo-Quenya: Since the root for “middle” was usually √ENED, I’d ignore this late revision and stick with ᴹQ. enya < ✶en[e]dya from The Etymologies (Ety/ÉNED).
entya, enetya adj. "central, middle" (VT41:16; these forms, as well as the noun entë "centre", come from a late, somewhat confused source; the adjective #endëa and the noun endë from earlier material may fit the general system better, and #endëa is even found in the LotR itself as part of the word atendëa, q.v.)