"densely" in the adverb sense
1. dumbly, densely, obtusely
in a stupid manner
"he had so rapaciously desired and so obtusely expected to find her alone"
2. densely, thickly
in a concentrated manner
"old houses are often so densely packed that perhaps three or four have to be demolished for every new one built"
"a thickly populated area"
Source: WordNet® (An amazing lexical database of English)
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