Definition of addle in English:

addle

Pronunciation /ˈadl/ /ˈædl/

verb

  • 1humorous with object Make (someone) unable to think clearly; confuse.

    ‘being in love must have addled your brain’
  • 2no object (of an egg) become rotten, producing no chick.

    ‘the extremely hot and dry weather had caused the eggs to addle’

adjective

archaic
  • (of an egg) rotten.

Origin

Middle English (in addle (adjective)): from Old English adela ‘liquid filth’, of Germanic origin; related to Dutch aal and German Adel ‘mire, puddle’.

Pronunciation

addle

/ˈadl/ /ˈædl/