disquiet

Noun

• the trait of seeming ill at ease

• a feeling of mild anxiety about possible developments

Verb

• disturb in mind or make uneasy or cause to be worried or alarmed
  • She was rather perturbed by the news that her father was seriously ill
    

Related words

• Synonyms: 
  unease , uneasiness , anxiousness , perturb , unhinge , trouble , cark , distract , disorder