Fruitlessly

The detectives fruitlessly investigated the crime scene for any useful evidence.

The politician fruitlessly campaigned to win the support of undecided voters.

The archaeologists fruitlessly excavated the site in search of ancient artifacts.

The patient fruitlessly sought a cure for her chronic illness.

Despite her best efforts, the student fruitlessly tried to understand the complicated math problem.

The detective fruitlessly interrogated the suspect, unable to elicit any useful information.

He fruitlessly attempted to fix his computer by pressing random buttons.