1. Showing a lack of intelligence or thought; stupid and silly
   - fatuous, inane, mindless, vacuous

See also: asininity, foolish

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• button up
• button-down
• button-quail
• button-shaped
• buttoned
• buttoned-down
• buttoned-up
• buttonhole
• buttonhole stitch
• buttonhook
• buttonlike
• buttonwood
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• buttress
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• buttressing
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• butyl
• butyl alcohol
• butyl nitrite
• butyl rubber
• butylate