An abstract noun denoting ease, prosperity, or security. Psalm 30:6 uses the term when the psalmist recalls his false confidence: 'In my prosperity I said, I shall never be moved.' The noun captures the dangerous self-assurance that comes from extended blessing—when life goes well, humans forget their dependence on God. The form שָׁלוּ (with suffix: שַׁלְוִי 'my prosperity') derives from roots related to ease and security. This prosperity becomes a theological problem in Scripture: blessing intended to prompt gratitude instead produces complacency. The psalmist's testimony warns that ease can blind us to our vulnerability and God's ongoing sustaining grace.