rattlebrained

/ˈrætəlˌbreɪnd/
adjective
  1. Silly, foolish, or unable to think clearly; scatterbrained.
    • He had a rattlebrained idea to build a boat out of cardboard.
    • I feel so rattlebrained today that I can't even finish a sentence.
    • My rattlebrained cousin forgot her own birthday party.
Antonyms
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