φθιν-οπωρινός, -ή, -όν (< φθινόπωρον, late autumn), autumnal: δένδρα φ., autumn trees (said to be without fruit therefore at a time when fruit might be expected; see Mayor's elaborate note, Ep. Ju., 55-59, and reff. there): Ju 12.† (AS)
Thayer:
1) autumn trees 1a) trees such as they are at the close of autumn, dry, leafless and without fruit 1b) metaph. of unfruitful, worthless men
φθινοπωρινός
phthinopōrinos
fthin-op-o-ree-nos'
From a derivative of φθίνω phthinō (to wane; akin to the base of G5351) and G3703 (meaning lateautumn) autumnal (as stripped of leaves)
φθείρω
phtheirō
fthi'-ro
Probably strengthened from φθίω phthiō (to pine or waste): properly to shrivel or wither, that is, to spoil (by any process) or (genitive) to ruin (especially figuratively by moral influences, to deprave)
KJV Usage: corrupt (self), defile, destroy.
G862 ἄφθαρτοςἄφθαρτος
aphthartos
af'-thar-tos
From G1 (as a negative particle) and a derivative of G5351; undecaying (in essence or continuance)
KJV Usage: not (in-, un-) corruptible, immortal.
G1311 διαφθείρωδιαφθείρω
diaphtheirō
dee-af-thi'-ro
From G1223 and G5351; to rotthoroughly, that is, (by implication) to ruin (passively decay utterly, figuratively pervert)
KJV Usage: corrupt, destroy, perish.
G2704 καταφθείρωκαταφθείρω
kataphtheirō
kat-af-thi'-ro
From G2596 and G5351; to spoilentirely, that is, (literally) to destroy; or (figuratively) to deprave
KJV Usage: corrupt, utterly perish.
G5349 φθαρτόςφθαρτός
phthartos
fthar-tos'
From G5351; decayed, that is, (by implication) perishable
KJV Usage: corruptible.
G5355 φθόνοςφθόνος
phthonos
fthon'-os
Probably akin to the base of G5351; illwill (as detraction), that is, jealousy (spite)
KJV Usage: envy.
G5356 φθοράφθορά
phthora
fthor-ah'
From G5351; decay, that is, ruin (spontaneous or inflicted, literally or figuratively)
ὀπώρα
opōra
op-o'-rah
Apparently from the base of G3796 and G5610; properly eventide of the (summer) season (dogdays), that is, (by implication) ripe fruit