The headword is neuter nominative/accusative singular of the two-termination adjective e)/kplutos.
[1] Adler cites for comparison Hesychius epsilon1634, which also uses e)ci/thlon ('fading') as a gloss for this headword, and relates it to dying. Adler also classifies the entry as a gl[ossa] Platonica' (repeated by Theodoridis at his Photius, Lexicon epsilon478), evidently because it appears as a totality in Timaeus' Platonic Lexicon. Thus the source of the headword is probably Plato, Laws 872E, where it is used figuratively of a miasma. (Nevertheless see already for this Aeschylus, Eumenides 281.)
[2] This additional gloss is lacking, Adler reports, in mss FVM. In ps.-Zonaras it is given as a)sqene/s ('weak') in place of the Suda's a)fane/s.