(a sound or signal given) a warning of danger

feeling of sudden fear

fear and uncertainty about the future

worry, tension

the unpleasant feeling caused by the nearness or possibility of danger or evil

alarm, apprehension

a feeling of discomfort but without clear signs of a particular illness

depression, sickness

(a feeling of) doubt, suspicion, distrust

uncertainty

a feeling of doubt (especially about whether one is doing or has done right); a temporary feeling of sickness in the stomach

nagging doubt

concern or anxiety

worry, anxiety

disquiet

disquiet

disturbed social condition(s)

state of agitation; disturbance