anankastic /ænənˈkæstɪk/adjective 2noun 2forms 3 adjective2 •Characterised by compulsion; obsessive-compulsive. •Imperative, as in the anankastic conditional. noun2 •(rare) An obsessive-compulsive individual.Like many anankastics, he suffers from a disturbance in the capacity to act, which is revealed especially as an impediment to beginning something new and completing something. — 2012 •An anankastic phrase or utterance. formsanankastics · more anankastic · most anankastic