E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Grave.
Solemn, sedate, and serious in look and manner. This is the Latin gravis, grave; but grave, a place of interment, is the Anglo-Saxon grf, a pit; verb, graf-an, to dig.
1
More grave than wise. Tertius e clo cecdit Cato.