A euphemism is a metaphorical or metonymic use of an expression in place of another expression that is disagreeable or offensive.
(English)
Mish, Frederick (editor). 1991.Webster's ninth new collegiate dictionary. Springfield, MA: Merriam-Webster. 1,564 pages. 0877795088; indexed 0877795096; deluxe 087779510X.
Beekman, John, and John Callow. 1974.Translating the Word of God. Grand Rapids, MI: Zondervan.