Immature

Immature
1. Not mature; unripe; not arrived at perfection of full development; crude; unfinished; as, immature fruit; immature character; immature plans. An ill-measured and immature counsel.
2. Premature; untimely; too early; as, an immature death.
Origin: L. Immaturus; pref. Im- not – maturus mature, ripe. See mature.