1. 
[syn: distressing, distressful, disturbing, perturbing, troubling, worrisome, worrying]
The Collaborative International Dictionary of English v.0.48:
Distressful \Dis*tress"ful\, a.
   Full of distress; causing, indicating, or attended with,
   distress; as, a distressful situation. "Some distressful
   stroke." --Shak. "Distressful cries." --Pope.
   Syn: distressing.
        [1913 Webster] -- Dis*tress"ful*ly, adv.
        [1913 Webster]
WordNet (r) 3.0 (2006):
distressful
    adj 1: causing distress or worry or anxiety; "distressing (or
           disturbing) news"; "lived in heroic if something
           distressful isolation"; "a disturbing amount of crime";
           "a revelation that was most perturbing"; "a new and
           troubling thought"; "in a particularly worrisome
           predicament"; "a worrying situation"; "a worrying time"
           [syn: distressing, distressful, disturbing,
           perturbing, troubling, worrisome, worrying]