thickly
adverb /ˈθɪkli/
  /ˈθɪkli/
- in a way that produces a wide piece or deep layer of something- thickly sliced bread
- Apply the paint thickly in even strokes.
 
- thickly wooded, populated, etc. having a lot of trees, people, etc. close together                                     
- in a deep voice that is not as clear as normal, especially because of illness or emotion- ‘Just leave me alone,’ he said thickly.