contourless

contour +‎ -less

contourless (not comparable)

1. Without a contour or contours.
   • 1934, George Orwell, chapter 2, in Burmese Days‎:

     Mrs Lackersteen was a woman of about thirty-five, handsome in a contourless, elongated way, like a fashion plate.

   • 1981, Ngũgĩ wa Thiong'o, Detained: A Writer's Prison Diary, London: Heinemann, Section One, p. 112,

     They would carry their private grief on their faces for a few weeks more before hiding it inside and resuming the communal, contourless monotony of prison life.