Makes someone worried, anxious, or uneasy; troubles or disturbs the peace of mind.
From dis- (opposite of) + quiet, derived from Latin quietus meaning 'at rest.' The prefix dis- reverses the meaning to create the opposite state of quiet.
Interestingly, 'disquiet' is one of those rare English words where the prefix dis- doesn't attach to a verb but to an adjective (quiet), showing how flexible English word-building can be even with strict grammatical rules.
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