ARBITRARINESS
flightiness, arbitrariness, whimsicality, whimsy, whimsey, capriciousness
(noun) the trait of acting unpredictably and more from whim or caprice than from reason or judgment; “I despair at the flightiness and whimsicality of my memory”
Source: WordNet® 3.1
Etymology
Noun
arbitrariness (usually uncountable, plural arbitrarinesses)
The quality or state of being arbitrary.
Synonyms
• arbitrarity (much less common)
Source: Wiktionary
Ar"bi*tra*ri*ness, n.
Definition: The quality of being arbitrary; despoticalness; tyranny. Bp.
Hall.
Source: Webster’s Unabridged Dictionary 1913 Edition