misbegotten
[adjective]
Synonyms: illegitimate, baseborn, bastard, fatherless, natural, spurious, supposititious, unfathered

[TahlilGaran] English Synonym Dictionary ▲

mis‧be‧got‧ten /ˌmɪsbɪˈɡɒtn◂ $ -ˈɡɑː-/ adjective [only before noun] old-fashioned

1. a misbegotten plan, idea etc is not likely to succeed because it is badly planned or not sensible

2. a misbegotten person is completely stupid or useless:
You misbegotten fool!

[TahlilGaran] Dictionary of Contemporary English ▲