Misguess

The employee's misguess resulted in a mistake that cost the company money.

His misguess about the weather made him underdressed for the cold.

The researcher's misguess led to a change in the hypothesis.

John's misguess about the time of the train caused him to miss it.

The coach's misguess about the opposing team's strategy resulted in a loss for their team.

The doctor's misguess about the patient's illness led to a delay in treatment.

Her misguess about the significance of the event made her miss out on a valuable opportunity.

His misguess about the age of the painting led him to buy a fake.

His misguess about the cost of the project caused the company to lose money.