subitaneously

English

subitaneously (comparative more subitaneously, superlative most subitaneously)

(formal) suddenly
- 1845, The Veterinary record, and Transactions of the Veterinary Medical Association.:
  It consists in a sudden accumulation of blood in the vessels, and a general plethora of the system, which manifests itself subitaneously.
- 1851, Robert Bigsby, Old Places Revisited, or The Antiquarian's Enthusiast:
  The ear of the appalled adventurers was subitaneously invaded, and their attention averted from the contemplation of sleeping beauty, by a shrill and bursting crash of earthly music.