Im-prĕs'sion-a-ble, a.

a. [Fr. impressionable, Sp. impressionable.] Susceptible of impression; capable of being molded; susceptible.

He was too impressionable; he had too much of the temperament of genius. Morley.

That she had done a grievous thing in taking an impressionable child to mold into the form that her wild resentment, spurned affection, and wounded pride found vengeance in, I knew full well. Dickens.