undulled

adj

1. Not dulled; sharp or alert.

   “How can we help admiring that open and cheerful brow which, as yet, no care or sin has furrowed; those light and active limbs, full of health and vigour; the eye so quick; the ear so undulled; the memory so ready; the young curiosity so eager to take in new knowledge; the young feelings, not yet spoiled by over-excitement, ready to admire, ready to love?”

   “In order to keep his intellect undulled by the routine of his dreary work, Matthew Arnold was wont to write a few lines of poetry each day.”