senselessly
1. [ adverb ] in a meaningless and purposeless manner
Examples:

"these innocent bystanders were senselessly killed"

Related terms: mindless mindless
2. [ adverb ] in an unreasonably senseless manner
Synonyms: mindlessly
Examples:

"these temples were mindlessly destroyed by the Red Guards"

Related terms: mindless mindless mindless
Similar spelling:   senseless
  senselessness