deferentially
1. [ adverb ] in a servile manner
Synonyms: submissively
Examples:

"he always acts so deferentially around his supervisor"

Related terms: deferent slavish slavish deferent
2. [ adverb ] in a respectfully deferential manner
Examples:

"he listened deferentially"

Related terms: deferent deferent
Similar spelling:   deferential
  differentially
  differential
  differentia