challenging

From Middle English chalengynge; equivalent to challenge +‎ -ing.

• IPA^(key): /ˈt͡ʃælənd͡ʒɪŋ/, /ˈt͡ʃælɪnd͡ʒɪŋ/

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challenging

1. present participle and gerund of challenge

challenging (comparative more challenging, superlative most challenging)

1. Difficult, hard to do.

• unchallenging

challenging (plural challengings)

1. 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.

• challenge