inutilement

In a sentence

• Il a travaillé inutilement sur ce projet, car personne ne l'a utilisé.

  He worked pointlessly on this project, as no one used it.

  In this sentence, 'inutilement' is used to mean that the effort spent was unnecessary because the project wasn't utilized.

• Elle s'est inquiétée inutilement pour ses amis, qui allaient très bien.

  She worried unnecessarily for her friends, who were doing very well.

  Here, 'inutilement' signifies that the act of worrying was unneeded as the friends were perfectly fine.

• Nous avons attendu inutilement parce que la réunion avait été annulée.

  We waited needlessly because the meeting had been canceled.

  In this example, 'inutilement' implies that the waiting turned out to be unnecessary due to the cancellation of the meeting.