1. Without gain or profit
   - profitlessly, gainlessly 
2. In an unproductive manner
   - unproductively, fruitlessly

See also: unprofitable

Antonym: profitably

• intensity
• intensity level
• intensive
• intensive care
• 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