1. Without effort or apparent effort
   "she danced gracefully and effortlessly"; "swallows gliding effortlessly through the air"

See also: effortless

• sulfamethoxazole
• sulfamezathine
• sulfanilamide
• sulfanilic acid
• sulfapyridine
• sulfate
• sulfide
• sulfisoxazole
• sulfonamide
• sulfonate
• sulfone
• sulfonic acid
• sulfonylurea
• sulfur
• sulfur bacteria
• sulfur bottom
• sulfur butterfly
• sulfur dioxide
• sulfur hexafluoride
• sulfur mine
• sulfur mustard
• sulfur oxide
• sulfur paintbrush
• sulfur-yellow
• sulfurette