strenuousness

But an inner strenuousness was preying upon an outer symmetry, and they rated his look as singular.

The first was marked by the strenuousness of D'Avezac fifteen years ago.

It is customary to complain of the bustle and strenuousness of our epoch.

Those knitted brows show a strenuousness of character incompatible with the serenity of the gods.

Stated briefly its message is that of an optimism which depends on a recognition of the strenuousness of life.