1. Denial: Refusing to acknowledge or accept a painful reality or truth. 2. Repression: Unconsciously blocking out or pushing away thoughts, feelings, or memories that are too difficult to deal with. 3. Projection: Attributing one's own unacceptable thoughts, feelings, or impulses to someone else. 4. Rationalization: Creating logical or socially acceptable explanations for one's behavior or feelings. 5. Displacement: Redirecting emotions or impulses from their original source to a less threatening target. 6. Regression: Reverting to an earlier stage of development in response to stress or anxiety. 7. Sublimation: Channeling unacceptable impulses or emotions into socially acceptable activities or behaviors. 8. Intellectualization: Overemphasizing rational thinking and logic to avoid dealing with emotions. 9. Reaction formation: Expressing the opposite of one's true feelings or impulses. 10. Undoing: Engaging in behavior to make up for or undo a previous unacceptable action.