An adjective appearing as ᴱQ. avanwa “going, passing, nearly gone” in the Qenya Lexicon of the 1910s under the early root ᴱ√AVA “go away, depart, leave” (QL/33). It seems to have a present-tense sense, that is “*currently going/passing”, as opposed to contemporaneous ᴱQ. vanwa with a past-tense sense: “gone, past, over, lost” (QL/99).

Neo-Quenya: For purposes of Neo-Quenya, I’d simply use the active participle of the later verb auta- “go away, pass away, departing”, as in ᴺQ. autaila “going away, passing away”.