deterioratingly

English edit

deterioratingly (comparative more deterioratingly, superlative most deterioratingly)

In a manner that makes worse.
- 1829, John S. Skinner, The American Farmer, page 266:
  In climates which operate deterioratingly upon the sheep, its good qualities can be maintained only by continued importations...
- 1970, L. D. Gupta, A new venture in education, page 54:
  Text books are frequently and deterioratingly changed and the result is that they repel the students.