The antonyms for the word "un-ripest" are "ripest" or "fully ripe". When referring to fruits, ripe means that they are no longer raw or uncooked and are ready to be eaten. Fruits at their peak of ripeness have a better flavor, texture, and color. The longer fruits are left to grow on the tree or the vine, the sweeter and more delicious they become. Therefore, it is important to choose fruits that are ripe and not "un-ripest," as they are not yet at their maximum flavor. Proper storage and handling can help preserve the fruit's ripeness, ensuring the best possible flavor and quality.