Yex

Part of speech: noun (n.)

A hiccough. [Written also yox, and yux.] [Obs. or Prov. Eng.] "The excessive yex." Holland.

Part of speech: verb (v.)

To hiccough. [Written also yox, yux.] [Obs. or Prov. Eng.] He yexeth and he speaketh through the nose. Chaucer.