anankastic

Etymology
Borrowed from, from.

Adjective

 * 1)  Imperative, as in the.
 * 2)  Characterised by compulsion; obsessive-compulsive.
 * 3) * 1991: ‘You’re a classic anal-retentive,’ he says, ‘tirelessly absorbed by minutiae, anankastic in the extreme – it’s lucky you have me to deal with the broad sweep of things, to do the abstract thinking.’ — Will Self, ‘Mono-Cellular’, The Quantity Theory of Insanity

Noun

 * 1)  An obsessive-compulsive individual.