1. In a stupid manner
   - densely, obtusely 
2. In an inarticulate manner
   "I nodded dumbly and he slit the envelope"

See also: dumb

• hygienical
• hygienically
• hygienics
• hygienise
• hygienist
• hygienize
• hygro-
• Hygrocybe
• Hygrocybe acutoconica
• hygrodeik
• hygrometer
• Hygrophoraceae
• Hygrophorus
• Hygrophorus borealis
• Hygrophorus caeruleus
• Hygrophorus inocybiformis
• Hygrophorus kauffmanii
• Hygrophorus marzuolus
• Hygrophorus purpurascens
• Hygrophorus russula
• Hygrophorus sordidus
• Hygrophorus tennesseensis
• Hygrophorus turundus
• hygrophyte
• hygrophytic