1. With no problems or difficulties
   "put the plans into effect quickly and smoothly"
   - swimmingly 
2. In a smooth and diplomatic manner
   "'And now,' he said smoothly, 'we will continue the conversation'"

See also: smooth

• bounce
• bounce back
• bounce out
• bounced check
• bounced cheque
• bouncer
• bounciness
• bouncing
• bouncing Bess
• bouncing Bet
• bouncing betty
• bouncing putty
• analogise
• analogist
• analogize
• analogous
• analogously
• analogue
• analogue computer
• analogy
• analphabet
• analphabetic
• analphabetism
• analysable
• analysand