Improvable

Im*prov"a*ble (?), a. [From Improve.] 1. Capable of being improved; susceptible of improvement; admitting of being made better; capable of cultivation, or of being advanced in good qualities.

Man is accommodated with moral principles, improvable by the exercise of his faculties.
Sir M. Hale.

I have a fine spread of improvable lands.
Addison.

2. Capable of being used to advantage; profitable; serviceable; advantageous.

The essays of weaker heads afford improvable hints to better.
Sir T. Browne.

-- Im*pro"a*ble*ness, n. -- Im*prov"a*bly, adv.