1. Foolish; totally unsound
   - crazy, half-baked, screwball

See also: impractical

• uncharitably
• uncharted
• unchartered
• unchaste
• unchastened
• uncheckable
• unchecked
• uncheerful
• uncheerfulness
• unchewable
• unchivalrous
• unchivalrously
• unchristian
• unchristianly
• unchristlike
• unchurch
• uncial
• unciform bone
• uncinate
• uncircumcised
• uncivil
• uncivilised
• uncivilized
• uncivilly
• unclad