It's saying that they won't sleep well because there is someone to be stressed about. For example, if the dictators or torturers are doing bad things and they find out that someone is onto them, they will be stressed out and can't sleep.
The Language Level symbol shows a user's proficiency in the languages they're interested in. Setting your Language Level helps other users provide you with answers that aren't too complex or too simple.
Has difficulty understanding even short answers in this language.
Can ask simple questions and can understand simple answers.
Can ask all types of general questions and can understand longer answers.
Can understand long, complex answers.
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