deadly

[ ded-lee ]
/ ˈdɛd li /

adjective, dead·li·er, dead·li·est.

adverb

in a manner resembling or suggesting death: deadly pale.
excessively; completely: deadly dull.

Origin of deadly

before 900; Middle English deedli(ch), Old English dēadlīce. See dead, -ly

SYNONYMS FOR deadly

1 See fatal.
4 dull, tedious, tiresome.

OTHER WORDS FROM deadly

dead·li·ness, noun non·dead·ly, adjective

WORDS THAT MAY BE CONFUSED WITH deadly

deadly deathly

Example sentences from the Web for deadly

British Dictionary definitions for deadly

deadly
/ (ˈdɛdlɪ) /

adjective -lier or -liest

likely to cause death deadly poison; deadly combat
informal extremely boring

adverb, adjective

like death in appearance or certainty deadly pale; a deadly sleep

Derived forms of deadly

deadliness, noun