Where Does Idiosyncrasy Come from?

The term "idiosyncrasy" originates from Greek ἰδιοσυγκρασία idiosynkrasía, "a peculiar temperament, habit of body" (from ἴδιος idios, "one's own", σύν syn, "with" and κρᾶσις krasis, "blend of the four humors" (temperament)) or literally "particular mingling".

What makes someone idiosyncratic?

Idiosyncratic means unique to an individual. Albert Einstein famously had lots of idiosyncratic habits. ... One thing that Einstein definitely wasn't was an idiot. Yet idiosyncratic and idiot are related. Idio is ancient Greek for "one's own." An idiosyncratic person is someone who does things in his own way.

What do you mean by idiosyncrasy?

1a : a peculiarity of constitution or temperament : an individualizing characteristic or quality. b : individual hypersensitiveness (as to a drug or food) 2 : characteristic peculiarity (as of temperament) broadly : eccentricity.