Noah Webster's Dictionary (a.) Incapable of being satisfied or appeased; as, an insatiable appetite, thirst, or desire.

Multi-Version Concordance Insatiable (3 Occurrences) 2 Peter 2:14 having eyes full of adultery, and who can't cease from sin; enticing unsettled souls; having a heart trained in greed; children of cursing; (See RSV) Proverbs 27:20 Sheol and destruction are insatiable; so the eyes of man are never satisfied. (DBY) Ezekiel 16:28 You have played the prostitute also with the Assyrians, because you were insatiable; yes, you have played the prostitute with them, and yet you weren't satisfied. (WEB ASV DBY WBS RSV NIV)