different between challenging vs nonchallenging

English

From Middle English chalengyng; equivalent to challenge +? -ing.

challenging

challenging (comparative more challenging, superlative most challenging)

challenging (plural challengings)

The act of making a challenge.
- 1918, Estcourt Rowland Metzner, The conflict of tax laws (page 151)
  There are always sincere challengings of the findings, always the objections (sincere in another sense) of those whose interests seem threatened.

non- +? challenging

nonchallenging (not comparable)

Not challenging.
- 2003, Myron F Weiner, Anne M Lipton, The dementias: diagnosis, treatment, and research
  In the home environment, nonchallenging activities such as watching television or taking short walks may be a good way to start.

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