Even though he tried to apologize, his nitwitted comment only made things worse.

The nitwits tried to fix the leaky pipe with tape, so the bathroom flooded by evening.

Don't be such a nitwit; double-check the address before you leave.

Her nitwittedness during the debate cost the team their best chance at winning.

He nitwittedly tried to fix the old clock with a hammer, only to make the problem much worse.

Her constant nitwittery at meetings frustrated the whole team.

Even though his plans were well-intentioned, his nitwittish mistakes turned the celebration into a comic disaster.