Under-age
Pronunciation : Un"der-age`
Part of Speech : a.
Definition : Defn: Not having arrived at adult age, or at years of discretion; hence, raw; green; immature; boyish; childish. [Obs.] I myself have loved a lady, and pursued her with a great deal of under-age protestation. J. Webster.
Source : Webster's Unabridged Dictionary, 1913