idiosyncratic

Meanings

1. 1
   adj

   peculiar to the individual

   we all have our own idiosyncratic gestures

2. 2
   adj

   Peculiar to a specific individual; eccentric.

   At the time, I set it down to some idiosyncratic, personal distaste […] but I have since had reason to believe the cause to lie much deeper in the nature of man.

Etymology

From idiosyncrasy + -ic. By surface analysis, idio- + syn- + -cratic.