1. In a meaningless and purposeless manner
   "these innocent bystanders were senselessly killed" 
2. In an unreasonably senseless manner
   - mindlessly

See also: senseless

• sand tumour
• sand verbena
• sand viper
• sand wedge
• sand-blind
• sandal
• sandaled
• sandalled
• sandalwood
• sandalwood family
• sandalwood tree
• sandarac
• sandarac tree
• sandarach
• sandbag
• sandbagger
• sandbank
• sandbar
• sandbar shark
• sandberry
• sandblast
• sandblaster
• sandbox
• sandboy
• sandbur