The first word is: 1. conscientiousness Definition the quality of working hard and being careful Used in a sentence you could say, “Conscientiousness is the key to a successful life.” Next word, 2. traits Definition a particular characteristic that can produce a particular type of behaviour Used in a sentence, you could say: “He definitely got those traits from his father.” And lastly, 3. extroversion Definition: the quality of being energetic and not shy, and enjoying being with other people Used in a sentence, you could say: “Extroversion is usually a trait that many people wish they had.”