grandesco — Lewis & Short
grandesco, ĕre,
I v. inch. n. [grandis], to become great, to grow (poet. and in postAug. prose):
quicque sua de materia grandescere alique (preceded by crescere),Lucr. 1, 191; cf. id. 2, 1122; 1160:
lentiscus triplici solita grandescere fetu, Cic. poët. Div. 1, 9, 15: grandescunt frumenta,Col. 2, 20, 2:
hordeum,Pall. Jun. 2:
lignum intus,Plin. 15, 3, 3, § 10.