Abarim Publications' online Biblical Hebrew Dictionary
The verb מנע (mana') means to withhold, keep back or refrain. This verb is often used to describe God's power to withhold something, like rain (Amos 4:7), offspring (Genesis 30:2) or blessings (Jeremiah 5:25). The wise man does not withhold good from those to whom it is due (Proverbs 3:27) or discipline from a child (Proverbs 23:13).
There are no derivations of this verb extant in the Bible.