The Collaborative International Dictionary of English v.0.48:

Angariation \An*ga"ri*a"tion\, n. [LL. angariatio, fr. L.
   angaria service to a lord, villenage, fr. angarius, Gr.
   'a`ggaros (a Persian word), a courier for carrying royal
   dispatches.]
   Exaction of forced service; compulsion. [Obs.] --Speed.
   [1913 Webster] Angeiology