Prorogue

Adjourn an assembly without discontinuing it.

Last night I was read­ing The Glo­ri­ous Cause: The Amer­i­can Rev­o­lu­tion, 1763 – 1789 when I came across this word, in a sen­tence refer­ring to the pro­rogue of Par­lia­ment in (I think) 1766. Usu­al­ly when I come across a word that is new to me I have some idea what it might mean from the con­text or famil­iar roots, but this one was entire­ly new to me.