1. Without problems or difficulties
   "NASA reported a trouble-free launch"

See also: untroubled

• deep down
• deep fording
• deep freeze
• deep freezer
• deep in thought
• deep kiss
• deep middle cerebral vein
• deep pocket
• deep red
• Deep South
• deep space
• deep supporting fire
• deep temporal vein
• deep-chested
• deep-dish pie
• deep-dye
• paramilitary organisation
• paramilitary organization
• paramilitary unit
• paramnesia
• paramount
• paramount issue
• paramountcy
• paramour
• paramyxovirus