ē-dūrus, a, um, adj.,
exceedingly hard , very hard (very rare): pirus, Verg. G. 4, 145. —Trop., harsh , cruel : eduro ore negare, Ov. A. A. 3, 476.
ē - dūrus adj., very hard: pirus, V. — Fig., cruel: Os, O. ...
An Elementary Latin Dictionary