Underestimate

You shouldn't underestimate the importance of exercise for your health.

The military's underestimate of the enemy's strength led to a tactical error.

Her underestimate of her opponent's skill cost her the match.

The patient's underestimate of their symptoms delayed their diagnosis.

The underestimate of the patient's condition led to a delay in treatment.

The team's underestimate of the weather conditions resulted in an accident.

His failure was due to the underestimate of the project's difficulty.

The politician's underestimate of the public's opinion caused a backlash.

The company's underestimate of market demand resulted in a shortage of supplies.

The underestimate of the cost of the renovation led to a budget shortfall.

Don't underestimate him just because he's young.