worrying, concerning, troubling
It's extremely worrying.
That's concerning.
Mais tu ne sais rien faire d'autre, donc c'est inquiétant.
But you don’t know how to do anything else, so that’s worrying.
— The Big Sick (2017)
En somme, l'Henrietta n'avait pas encore un retard inquiétant.
All in all, the Henrietta wasn't running worryingly late yet.
Il avait quelque chose d’inquiétant.
There was something unsettling about him.
It was worrying.