"disquiet" in the noun sense
1. anxiousness, disquiet
a feeling of mild anxiety about possible developments
2. disquiet, unease, uneasiness
the trait of seeming ill at ease
"disquiet" in the verb sense
1. perturb, unhinge, disquiet, trouble, cark, distract, disorder
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"
Source: WordNet® (An amazing lexical database of English)
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