im·ma·ture 
(ĭm′ə-tyr, -chr, -tr)
(ĭm′ə-tyr, -chr, -tr)adj.
1. Not fully grown or developed: an immature plant.
2. Marked by or suggesting a lack of normal maturity: silly, immature behavior. See Synonyms at young.
n.
An immature animal; a juvenile.
[Latin immātūrus : in-, not; see IN-1 + mātūrus, mature; see mā-1 in the Appendix of Indo-European roots.]
im′ma·turely adv.
im′ma·turi·ty, im′ma·tureness n.
- intervalic
- intervallic
- intervene
- intervener
- intervenor
- intervention
- interventional
- interventionism
- interventionist
- intervertebral
- intervertebral disc
- intervertebral disk
- intervertebrally
- interview
- interviewable
- interviewee
- interviewer
- inter vivos
- intervocalic
- interweave
- intestacy
- intestate
- intestinal
- intestinal fortitude
- intestinally