rōbŏrĕus — Lewis & Short
rōbŏrĕus, a, um, adj.robur,
I oaken, of oak, oak-:
pons,Ov. F. 5, 622:
axes,Col. 6, 19, 1; 6, 30, 2:
materies,id. 11, 2, 13:
ligna,Plin. 28, 8, 29, § 113.