Im*press"ive*ness

from The Collaborative International Dictionary of English v.0.48

Impressive \Im*press"ive\ ([i^]m*pr[e^]s"[i^]v), a. [Cf. F.
   impressif.]
   1. Making, or tending to make, an impression; having power to
      impress; adapted to excite attention and feeling, to touch
      the sensibilities, or affect the conscience; as, an
      impressive discourse; an impressive scene.
      [1913 Webster]

   2. Capable of being impressed. [Obs.] --Drayton. --
      {Im*press"ive*ly}, adv. -- {Im*press"ive*ness}, n.
      [1913 Webster]