misconceive

verb2

1. •
   To misunderstand.

   • Nay, misconceive me not, madam, when I say I have had a gen'rous and a faithful passion, which you had never favoured, but through revenge and policy. — 1694
2. •
   To judge or plan badly, typically on the basis of faulty misunderstanding.

   • HS2 has never had that. It was missold, misnamed and misconceived. It was promoted as a piece of engineering, rather than as a vital part of the railway. — 2024