1. In a thoughtless manner
   "he stared thoughtlessly at the picture"
   - unthinkingly, unthinking 
2. Showing thoughtlessness
   "he treated his parents thoughtlessly"

See also: thoughtless

Antonym: thoughtfully

• intensive care unit
• intensively
• intensiveness
• intent
• intention
• intentional
• intentionality
• intentionally
• intentive
• intently
• intentness
• inter
• inter alia
• inter vivos trust
• inter-group communication
• inter-service support
• Inter-Services Intelligence
• Interac
• interact
• interaction
• interactional
• interactive
• interactive multimedia
• interactive multimedia system
• interactive processing