deadly

dead-ly · adjective

imported

Definitions

adjective

  1. 1.

    Capable of causing death; fatal or lethal.

  2. 2.

    Extremely accurate or effective.

  3. 3.

    Extremely boring or dull (informal).

  4. 4.

    Filled with hatred or hostility.

  5. 5.

    Extremely; very (informal).

Related words

Antonyms: benign, harmless, safe
See also: fatal, lethal, mortal
Synonyms: dangerous, fatal, lethal, mortal

Etymology

From Old English deadlic meaning "subject to death" or "mortal," from dead + -lic (equivalent to modern -ly).