Im*press"ive*ly

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]
    

82 Moby Thesaurus words for "impressively":
      abundantly, acutely, amazingly, amply, ardently, astonishingly,
      awesomely, conspicuously, copiously, effectively, elaborately,
      elegantly, eloquently, eminently, emphatically, exceptionally,
      expressively, exquisitely, extraordinarily, extravagantly,
      exuberantly, famously, fervently, fluently, forcefully, generously,
      glaringly, glibly, gloriously, glowingly, grandiosely, grandly,
      graphically, imposingly, in glowing terms, incredibly, intensely,
      luxuriously, magically, magnanimously, magnificently, majestically,
      markedly, marvelously, meaningfully, nobly, notably, particularly,
      passionately, peculiarly, pointedly, powerfully, preeminently,
      profusely, prominently, pronouncedly, proudly, remarkably, richly,
      signally, singularly, smoothly, spiritedly, splendaciously,
      splendidly, splendiferously, strikingly, sumptuously, superbly,
      superlatively, surpassingly, surprisingly, tellingly, uncommonly,
      unusually, vehemently, vigorously, vividly, warmly, wonderfully,
      wondrous, worthily