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| to disturb; to perturb; to interfere; to trouble; to get turbid; to dull; to cloud | |||
| to become cloudy; to darken; to dull; to haze | |||
| dull; darken; haze; become cloudy | |||
| agitate | |||
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| troubles | |||
| troubler: 40 phrases in 12 subjects |
| British usage, not spelling | 1 |
| Chemistry | 4 |
| Criminal law | 2 |
| Earth sciences | 2 |
| Economy | 1 |
| Education | 1 |
| General | 9 |
| Health care | 6 |
| Law | 2 |
| Medical | 8 |
| Natural resourses and wildlife conservation | 1 |
| United Nations | 3 |