Source : Webster's Revised Unabridged Dictionary (1913)

Merrymake \Mer"ry*make`\, n.
   Mirth; frolic; a meeting for mirth; a festival. [Written also
   {merrimake}.]

Merrymake \Mer"ry*make`\, v. i.
   To make merry; to be jolly; to feast. [Written also
   {merrimake}.]