worst-case

[ wurst-keys ]
/ ˈwɜrstˌkeɪs /

adjective

of the worst possibility; being the worst result that could be expected under the circumstances: a worst-case scenario.
Compare best-case.

Origin of worst-case

First recorded in 1960–65

British Dictionary definitions for worst case

worst case

noun

  1. a situation in which the most unfavourable conditions prevail
  2. (as modifier)a worst-case projection of a massive accident