Renounce - Vine's Expository Dictionary of New Testament Words
Renounce
[ 1,,G550, apeipon ]lit., to tell from" (apo, "from," eipon, an aorist form used to supply parts of lego, "to say"), signifies "to renounce," 2 Corinthians 4:2 (Middle Voice), of disowning "the hidden things of shame." In the Sept. of 1 Kings 11:2 it signifies "to forbid," a meaning found in the papyri. The meaning "to renounce" may therefore carry with it the thought of forbidding the approach of the things disowned.
[ 2,,G657, apotasso ]
"to set apart, to appoint," a meaning found in the papyri (apo, from, tasso, "to arrange"), is used in the Middle Voice in the sense either of "taking leave of," e.g., Acts 18:18, or "forsaking," Luke 14:33, RV, "renounceth" (AV "forsaketh"). See FORSAKE, LEAVE.