Insufferable/ɪnˈsʌfrəbl/ Definition 1 of 2Pro Tip 1/3Negative Tone Used to express strong disapproval or frustration with someone’s behavior. His insufferable gloating after the game made everyone upset. Pro Tip 2/3Emotional Impact Highlights the emotional burden someone or something causes. Her constant complaining was becoming insufferable. Pro Tip 3/3Avoid Revealing Intolerance Be cautious when using it as it may imply the speaker's own lack of patience. I found his excuses insufferable, though others seemed more forgiving.