dumbly
1. [ adverb ] in a stupid manner
Synonyms: obtusely densely
Examples:

"he had so rapaciously desired and so obtusely expected to find her alone"

Related terms: dense dense dense dense
2. [ adverb ] in an inarticulate manner
Examples:

"I nodded dumbly and he slit the envelope"

Related terms: speechless speechless
Similar spelling:   Dumbleton
  dumbbell