unpreventable
1. [ adjective ] not preventable
Examples:

"unpreventable hysteria"

Related terms: preventable
Similar spelling:   unpresentable
  unprintable
  unpredictable
  unforeseeable
  unapparent
  unprofitable
  unparented
  unpredictably
  unfrequented
  unforeseen
  unprogressive
  unprofitably
  unprofitableness
  unpresidential
  unprecedented
  unappareled