DSL - DOST   Wisht, Weist, Whisht, exclam.  [ME and e.m.E.  whist  (Wyclif), whis(c)ht (both 15th c.), wheesht (1684).] Hush! Be quiet! ---  Weist, hald 3our tongue! 1567 Crim. Trials I i 494.  At night it [sc. the spirit] cryed wisht, wisht, at every sentence in the close of prayer; 1695 Sharpe Witchcraft 241.  In time of prayer it whisled, groaned, and cryed whisht, whisht; 1695 Sharpe Witchcraft 247.