noun

a feeling that something bad will happen; fearful apprehension.

with a sense of foreboding she read the note

apprehension,apprehensiveness,anxiety,perturbation,trepidation,disquiet,disquietude,unease,uneasiness,misgiving,suspicion,worry,fear,fearfulness,dread,alarm,butterflies (in the stomach),the willies,the heebie-jeebies,the jitters,jitteriness,twitchiness,inquietude,premonition,presentiment,intuition,feeling,vague feeling,inkling,hunch,warning,omen,portent,sign,token,prediction,augury,prophecy,presage,prognostication,forecast,gut feeling,feeling in one’s bones,funny feeling,sixth sense

adjective

implying that something bad is going to happen.

when the Doctor spoke, his voice was dark and foreboding