malheureusement

In a sentence

• Malheureusement, je ne peux pas venir à votre fête demain.

  Unfortunately, I can't come to your party tomorrow.

  Here, 'malheureusement' introduces the speaker's regret about their inability to attend the party.

• Malheureusement, il pleut trop pour sortir aujourd'hui.

  Unfortunately, it's raining too much to go outside today.

  In this example, 'malheureusement' expresses disappointment due to the weather condition.

• Malheureusement, le livre que je voulais est en rupture de stock.

  Unfortunately, the book I wanted is out of stock.

  The usage of 'malheureusement' conveys a sense of dismay regarding for the unavailability of an item.