The antonyms for the word "Pessimistical" are optimistic, hopeful, positive, confident, confident, assured, certain, encouraged, enthusiastic, and proactive. Optimistic means having a positive outlook towards the future, hopeful signifies a belief in positive outcomes, and positive is about having a good attitude towards life. Confident is the belief in one's abilities, and assured denotes a sense of certainty. Certain is the state of being sure of something, while encouraged is to feel motivated and uplifted. Enthusiastic means being passionate and excited about something, while proactive is to take initiative and make things happen. These antonyms of pessimistical can help cultivate a positive attitude and outlook towards life.