Unripe (adjective)

1. Not having reached full maturity or not having reached a state of readiness.
2. Not having developed fully or not having reached its full potential.
3. Not being ready to be eaten or not being ready to be used.

Origin:

From the old english word "unrípe" meaning not ripe or not mature.

Examples:

1. The fruit was unripe and not ready to be picked.
2. The unripe berries were not yet sweet.
3. The unripe banana was still green and firm.
4. The unripe tomatoes were not yet red.
5. The unripe avocado was not yet soft.