Webster’s Revised Unabridged Dictionary · 1913
Hesychast
Hes′y·chast (hĕs′ĭ·kăst), n. [Gr. ἡσυχαστής hermit, fr. ἡσυχάζειν to be still or quiet, fr. ἥσυχος still, calm.] One of a mystical sect of the Greek Church in the fourteenth century; a quietist. Brande & C.