• Defining "Restraint": The word restraint refers to the act of holding back or keeping something under control. It can be physical (like a barrier) or, as used in most exam contexts, mental and emotional.
Core Meaning: When applied to a person's behavior, restraint means the ability to stop oneself from doing something or showing too much emotion.
Synonym Match: Self-control is the most accurate synonym because it directly refers to the ability to control one's emotions, desires, or expressions in difficult situations.