A
quirk is a peculiar trait.
Quirky, is a way to describe a persons behavior when their behavior is peculiar and
quirkiness is a state of being quirky.
The forms of quirk are:
quirk·i·ly
adverb quirk·i·ness
noun
quirk·ish
adjective
quirky
adjective
The suffix
-ness, which goes back to Old English, continues to have a productive life. It commonly attaches to adjectives in order to form abstract nouns, such as
artfulness and
destructiveness. The suffix
-ness also forms nouns from adjectives made of participles, such as
contentedness and
willingness. It can also form nouns from compound adjectives, such as
kindheartedness and
straightforwardness. The suffix
-ness can even be used with phrases:
matter-of-factness.
Quirkiness is a noun formed from the adjective "
quirky"
Quirk or Quirkiness 
Linear Mode
