The Collaborative International Dictionary of English v.0.48:

Gratulate \Grat"u*late\, v. t. [imp. & p. p. Grqatulated; p.
   pr. & vb. n. Gratulating.] [L. gratulatus, p. p. of
   gratulari to congratulate, fr. gratus pleasing, agreeable.
   See Grate, a.]
   To salute with declaration of joy; to congratulate. [R.]
   --Shak.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Gratulate \Grat"u*late\, a.
   Worthy of gratulation. [Obs.]
   [1913 Webster]

         There's more behind that is more gratulate. --Shak.
   [1913 Webster]