Boland is an immature kid with a lean, unsmiling face, ice-blue eyes, and wavy blond hair.
Log line: A no-nonsense new captain at a Brooklyn police precinct forces an immature but brilliant detective to grow up.
Margene has often seemed the most immature of Bill's three wives, little more than a child herself.
1540s, "untimely, premature," from Latin immaturus "untimely, unripe," from assimilated form of in- "not, opposite of" (see in- (1)) + maturus (see mature (v.)). In 16c., usually in reference to early death; modern sense of "not fully developed" first recorded 1640s. In reference to mentalities or behaviors not considered age-appropriate, from 1920.
immature im·ma·ture (ĭm'ə-tyur', -tur', -chur')
Not fully grown or developed.