dotty

 
Pronunciation: /ˈdɒti/

adjective (dottier, dottiest)

British informal
  • eccentric or slightly mad: a dotty old lady
  • (dotty about) infatuated with: she’s dotty about her husband

Derivatives

dottily

adverb

dottiness

noun

Origin:

late 19th century: perhaps from obsolete dote 'simpleton, fool', apparently from Dutch dote 'folly'