immature

Adjective
  1. Characteristic of a lack of maturity (synset 301495542)
    "immature behavior"
  2. (used of living things especially persons) in an early period of life or development or growth (synset 301651383)
    "young people"
  3. Not fully developed or mature;
    Not ripe (synset 301497045)
    "unripe fruit"; "fried green tomatoes"; "green wood"
  4. Not yet mature (synset 301493085)
  5. (of birds) not yet having developed feathers (synset 301100164)
    "a small unfledged sparrow on the window sill"

Found on Word Lists

Find words of a similar nature on these lists:

Other Searches