Adjective: softheaded 'sóft,he-did or 'sóft'he-did
- Foolish; totally unsound
"That's a softheaded idea";
- crazy [informal], half-baked [informal], screwball [informal], crackpot [informal], moronic [informal], nutty [informal], wiggy [US, informal]
See also: absurd, cockeyed [informal], derisible, derisory, idiotic, impractical, laughable, ludicrous, nonsensical, preposterous, ridic [informal], ridiculous