Antonyms for the word "decrepitates" can be determined by understanding its meaning, which implies weakness, frailty, and deterioration. Hence, the antonyms can be synonyms of strength, durability, and robustness. Some of the antonyms of "decrepitates" could be words that denote speedy and lively movements, such as energetic, vigorous, robust, powerful, strong, forceful, sturdy, and healthy. These antonyms suggest a sense of vitality and potency, giving the opposite meaning to that of decrepitates. Other antonyms of decrepitates could be words such as new, pristine, fresh, and modern, meaning that it is not old or worn out.