(a.) Approaching maturity.

at half cock baby callow fledgling green half-baked half-cocked half-grown hopeful ill-digested immature impubic infant junior juvenal juvenile maturescent minor nubile pubescent raw sapling slip sprig stripling teenager teener teenybopper underripe unfledged ungrown unmellowed unripe unseasoned young hopeful young person younger youngest youngling youngster youth