unmercifully
1. [ adverb ] without pity; in a merciless manner
Synonyms: pitilessly remorselessly mercilessly
Examples:

"he was mercilessly trounced by his opponent in the House"

Related terms: merciless merciless pitiless pitiless merciless pitiless
Similar spelling:   unmerciful
  unmercifulness
  unregretful
  unmercenary