Meaning : The trait of acting unpredictably and more from whim or caprice than from reason or judgment.
Example :
I despair at the flightiness and whimsicality of my memory.
Synonyms : capriciousness, flightiness, whimsey, whimsicality, whimsy
Arbitrariness ka meaning, vilom shabd, paryayvachi aur samanarthi shabd in Hindi. Arbitrariness ka matlab kya hota hai?