alarming

He has heard some alarming rumors about what's happening around here.

Il a entendu des rumeurs inquiétantes sur ce qui se passe par ici.

— The Captain (2018)

This is alarming.

C’est alarmant.

I found that very alarming.

J’ai trouvé cela très alarmant.

Look at the numbers and you can see how alarming it is!

Regardez les chiffres et vous verrez à quel point c'est alarmant !

— Moscow Does Not Believe in Tears (1980)

In Moscow alone, it's alarming!

Rien qu’à Moscou, c’est alarmant !

— Moscow Does Not Believe in Tears (1980)