Maturate essentially means "to reach maturity." The antonyms or opposite words for the concept of "maturate" can be young or immature. Other possible antonyms include raw, undeveloped, unripe, unseasoned, unprocessed, and inexperienced. These words convey the idea of something that is not ready or matured yet, and lacks the characteristics of adequate growth and development. In a broader sense, antonyms for maturate can also include words like decay, deteriorate, spoil, damage, and ruin, which reflect the reverse process of growth and maturation. The antonyms of maturate are useful in describing negative outcomes that can occur when a process of maturation and development is not adequately supported.