jawfallen

adjective2

1. •
   (no longer used) Dejected, dispirited.

   • He was pitifully jawfallen. As the guards jogged him out of the room he waved me a farewell. — 1897
2. •
   (no longer used) Having a "fallen" or locked jaw (and hence sometimes unable to speak), variously attributed to dejection (the previous sense) or lockjaw.