"to make old" (palaios), is translated in Hebrews 8:13 , firstly, "hath made ... old," secondly (Passive Voice), RV "is becoming old" (AV, "decayeth"); "wax old," Luke 12:33; Hebrews 1:11 . See OLD.

2: διαφθείρω

(Strong's #1311 — Verb — diaphtheiro — dee-af-thi'-ro )

"to destroy utterly," as used in 2 Corinthians 4:16 (here in the Passive Voice, lit., "is being destroyed), is rendered "is decaying" (RV, for AV, "perish"). See CORRUPT , DESTROY.

Bibliography Information
Vines, W. E., M. A. Entry for 'Decay'. Vine's Expository Dictionary of NT Words. https://www.studylight.org/dictionaries/eng/ved/d/decay.html. 1940.

Bible Dictionaries Decay

Vine's Expository Dictionary of NT Words

Bible Dictionaries
Decay