The Collaborative International Dictionary of English v.0.48:

Phrensy \Phren"sy\, v. t.
   To render frantic.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Phrensy \Phren"sy\, n.
   Violent and irrational excitement; delirium. See Frenzy.
   [1913 Webster]