Today’s word of the day is ultroneous, meaning “spontaneous” or “voluntary,” and described by William Ballantyne Hodgson as “not recognised by Johnson, and little needed by the English tongue.” It’s from the same Latin root ultro- as ultromotivity, capability of spontaneous movement. Eleanor Agnes Moore has a deliciously dreadful poem titled “Ultroneus” in her Poems of Endowment on The Realities of Life:

          While the influence is morally, physically and refining,
          Yet by softening and cheering expressions made,
          Intellect may be developed and the power of thought strengthened.
          When the part of ultroneous is retained to be used at times.

Eleanor Agnes Moore