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

Antonym: cheerfully

• parallel port
• parallel processing
• parallel-park
• parallel-veined leaf
• parallelepiped
• parallelepipedon
• parallelise
• parallelism
• parallelize
• parallelogram
• parallelopiped
• parallelopipedon
• paralogism
• paralogy
• paralyse
• paralysed
• paralysis
• paralysis agitans
• paralytic
• paralytic abasia
• paralytical
• paralyze
• paralyzed
• paramagnet
• paramagnetic