The Collaborative International Dictionary of English v.0.48:

pacate \pa"cate\ (p[=a]"k[asl]t), a. [L. pacatus, p. p. of
   pacare to pacify, fr. pax, pacis, peace. See Pay to
   requite, Peace.]
   Appeased; pacified; placated; tranquil. [R.]
   [1913 Webster]