faulty

An electrical wiring system that is installed incorrectly or has become damaged, posing a safety risk.

A brake system that fails to operate safely and effectively.

Equipment that is not functioning properly.

An appliance that does not work correctly due to a defect.

Work or craft that has been done poorly or with a lack of skill.

A valve that does not open, close, or regulate flow correctly.

Products or merchandise that are defective or do not meet quality standards.

The inability to remember events or information accurately.

A line of reasoning that contains errors or fallacies.

The process of thinking about something in an illogical or incorrect way.

Incorrect or unreliable information, especially in a military or political context.