Subitaneous

from The Collaborative International Dictionary of English v.0.48

Subitaneous \Sub`i*ta"ne*ous\, a. [L. subitaneus. See {Sudden}.]
   Sudden; hasty. [Obs.] --Bullokar. -- {Sub`i*ta"ne*ous*ness},
   n. [Obs.]
   [1913 Webster]