The antonyms for the word "art tardy" are prompt and timely. Prompt means to act quickly or without delay, while timely refers to something that is done at the right time or at an opportune moment. These two words are often used in contrast to "art tardy," which implies a lateness or delay in action. Being prompt and timely are important qualities in the professional world as it allows individuals to meet deadlines, complete tasks efficiently, and maintain a good reputation. By being proactive and staying ahead of schedule, individuals can avoid the negative effects of tardiness and reap the benefits of being timely and prompt.