incautelous

Example:His careless attitude towards traffic rules nearly caused a chain reaction on the road.

Definition:Shows a lack of concern for details and a tendency to act without thought to the potential risks or consequences.

Example:She was heedless of the warning signs and continued to risk her health by smoking.

Definition:Shows a lack of attention to potential dangers or adverse consequences.

Example:The reckless behavior of his friends nearly cost him a lot of trouble, as they had gone on an adventure in a remote area without proper preparation.

Definition:Adventurous and urge to take risks and has little regard for possible harm or injury.