From unfair +‎ -ness.

• (Received Pronunciation) IPA^(key): /ʌnˈfɛənəs/
• (General American) IPA^(key): /ʌnˈfɛɚnəs/

  • Audio (US):

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• (General Australian) IPA^(key): /ɐnˈfeːnəs/
• (New Zealand, without the cheer–chair merger) IPA^(key): /ɐnˈfeənəs/
• (New Zealand, cheer–chair merger) IPA^(key): /ɐnˈfiənəs/
• (Scotland) IPA^(key): /ʌnˈfeɹnəs/
• (Northern England) IPA^(key): /ʊnˈfɛːnəs/
• (Lancashire, fair–fur merger) IPA^(key): /ʊnˈfɜː(ɹ)nəs/
• (Liverpool, fair–fur merger) IPA^(key): /ʊnˈfeːnəs/
• Rhymes: -ɛə(ɹ)nəs

unfairness (usually uncountable, plural unfairnesses)

1. (uncountable) The state of being unfair; lack of justice.

   Antonym: fairness

   • 2024 January 28, Charles Hugh Smith, Our Tax System Is an Unfair Mess: Here's How to Fix It‎:

     The reason why fairness in taxation matters is institutionalized unfairness rots society from the inside, and the social order and economy eventually collapse.

2. (countable) An unjust act or situation.
   • 2001, Jonathan Franzen, The Corrections:

     That this woman was Chip's little sister, Denise—i.e., was the only attractive young woman on the planet whom he was neither permitted nor inclined to feast his eyes on and imagine having sex with—seemed to him just the latest unfairness in a long morning of unfairnesses.