Quenya 

entya

central, middle

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.)

entya

adjective. central, middle

enetya

enetya

enetya, see entya

entë

center

entë (2) noun "center" (VT41:16; endë is perhaps to be preferred, see entya)