idiosyncratically

adjective

1. pertaining to the nature of idiosyncrasy, or something peculiar to an individual: The best minds are idiosyncratic and unpredictable as they follow the course of scientific discovery.

adjective

1. of or relating to idiosyncrasy; characteristic of a specific person

n.

1779, from idiosyncrasy + -ic. Earlier in same sense was idiosyncratical (1640s). Related: Idiosyncratically.