deadliest

/D EH1 D L IY0 AH0 S T/
adjective
  1. 1

    Subject to death; mortal.

  2. 2

    Causing death; lethal.

  3. 3

    Aiming or willing to destroy; implacable; desperately hostile.

    โ€œdeadly enemiesโ€

  4. 4

    Very accurate (of aiming with a bow, firearm, etc.).

  5. 5

    Very boring.

  6. 6

    Excellent, awesome, cool.

Source: https://en.wiktionary.org/wiki/deadliest, https://en.wiktionary.org/wiki/deadly