/ ˈwʌriɪŋ; NAmE ˈwɜːr-/ adjective
that makes you worry :
a worrying development
It must be worrying for you not to know where he is.
It is particularly worrying that nobody seems to be in charge.
It's been a worrying time for us all.
► worry·ing·ly adverb :
worryingly high levels of radiation
Worryingly, the plan contains few details on how spending will be cut.