1. In an unhappy manner
   "he cheerlessly set out to do the task"
   - mirthlessly

Antonym: cheerfully

• serous membrane
• serovar
• serow
• Serpasil
• Serpens
• dirty tricks
• dirty war
• dirty word
• dirty-faced
• dirty-minded
• dirtying
• dis
• disa
• disability
• disability benefit
• disability check
• disability insurance
• disability of walking
• disability payment
• disable
• disabled
• disablement
• disabling
• disabuse
• disabused