Ungrown

ppl. a. [UN-¹ 8 b.] Not yet grown up or fully grown; immature.

1592.  Shaks., Ven. & Ad., 526. No fisher but the ungrown fry forbears. Ibid. (1596), 1 Hen. IV., V. iv. 23. With lustier maintenance then I did looke for Of such an vngrowne Warriour.

1633.  P. Fletcher, Purple Isl., VI. iv. A narrow compasse best my ungrown Muse impounds.

1880.  Miss Broughton, Sec. Th., I. i. The Squire; his half-grown daughters…; [and] his ungrown son.