0
Injudicious means 'ill judged'.
injudicious, nonsensical
Not prudent; wanting in prudence or discretion; indiscreet; injudicious; not attentive to consequence; improper.
If you think carefully first, you will make a judicious choice. (adjective)
Antonyms of careful that have that kind of C are capricious, injudicious, nonchalant, and unconcerned.