promiseful

The general theory of organic evolution—the theory of Descent—tacitly makes the assumption, which is the basal hope of all biology, that it is not only legitimate but promiseful to try to interpret scientifically the history of life upon the earth.

Recklessness and unscrupulousness in the choice and application of the means, are weapons infinitely more effective and promiseful of success than all human virtues put together.

It was not precisely the romantic valley of our song, but it was a rich and promiseful plot and my father seemed entirely content.

Life to her was sweet and promiseful.

The yielding odorous soil is promiseful after its stubborn hardness of winter months and we watch it eagerly for the first herbaceous growth.