nervous

a.

  1. possessing nerve; sinewy; strong; vigorous.
  2. Possessing or manifesting vigor of mind; characterized by strength in sentiment or style; forcible; spirited; as, a nervous writer.
  3. Of or pertaining to the nerves; seated in the nerves; as, nervous excitement; a nervous fever.
  4. Having the nerves weak, diseased, or easily excited; subject to, or suffering from, undue excitement of the nerves; easily agitated or annoyed.
  5. Sensitive; excitable; timid.