adjective
unripe
un-RYPE/ˌʌnˈraɪp/
Not yet ripe or fully mature.
The unripe bananas remain entirely green with hard, angular ridges.

Etymology
Ripe described grain or fruit ready for harvesting and animals fit for eating. Adding “not” marks something that has not yet reached that mature, usable stage.
In context
This melon isn't right. How about that? No guarantee it's ripe. It's completely raw. Isn't it normal for a melon to be unripe?
More examples
- This recipe uses unripe mangoes for a tangy salad.
- Leave the unripe tomatoes on the vine a little longer.
- An unripe banana is usually firmer and less sweet.
Forms
unripe
ripe adjective — Fully mature or ready to eat.