troubling
verb
Definitions
To disturb, stir up, agitate (a medium, especially water).
To mentally distress; to cause (someone) to be anxious or perplexed.
Example: What she said about narcissism is troubling me.
In weaker sense: to bother or inconvenience.
Example: I will not trouble you to deliver the letter.
To take pains to do something.
Example: I won't trouble to post the letter today; I can do it tomorrow.
noun
Definitions
The infliction of trouble or distress.
adjective
Definitions
Distressing, worrying