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.
From G1 (as a negative particle) and a derivative of G5351; undecaying (in essence or continuance)
KJV Usage: not (in-, un-) corruptible, immortal.
From G1223 and G5351; to rotthoroughly, that is, (by implication) to ruin (passively decay utterly, figuratively pervert)
KJV Usage: corrupt, destroy, perish.
From G2596 and G5351; to spoilentirely, that is, (literally) to destroy; or (figuratively) to deprave
KJV Usage: corrupt, utterly perish.
From G5351; decayed, that is, (by implication) perishable
KJV Usage: corruptible.
From a derivative of φθίνω phthinō (to wane; akin to the base of G5351) and G3703 (meaning lateautumn) autumnal (as stripped of leaves)
KJV Usage: whose fruit withereth.
From G5351; decay, that is, ruin (spontaneous or inflicted, literally or figuratively)