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

Antonym: cheerfully

• adhesiveness
• adhocracy
• Adi Granth
• adiabatic
• adiabatic process
• Adiantaceae
• Adiantum
• Adiantum bellum
• Adiantum capillus-veneris
• Adiantum pedatum
• Adiantum tenerum
• Adiantum tenerum farleyense
• adiaphorous
• adience
• adient
• adieu
• Adige
• adios
• adipic
• adipic acid
• adipocere
• adipose
• adipose cell
• adipose tissue
• adipose tumor