quiddities

/K W IH1 D AH0 T IY0 Z/
noun
  1. 1

    The essence or inherent nature of a person or thing.

  2. 2

    A trifle; a nicety or quibble.

  3. 3

    An eccentricity; an odd feature.

Source: https://en.wiktionary.org/wiki/quiddities, https://en.wiktionary.org/wiki/quiddity