robustness

Mere physical robustness is of far less account in carrying one through an extended course of study than prudence and good sense.

The fever might have gone the worse with her because of her over-fed robustness; at any rate it went badly enough.

Looking back at him, what strikes one most was his singularly boyish cheerfulness and robustness of temperament.

Craven, fresh from his successes at golf, looked full of the open-air spirit and the robustness of the galloping twenties.

There was a certain pleasant, natural robustness of spirit, and something of a feudal free-and-easiness.