1. Without animation or vitality
   "lifelessly he performed the song" 
2. In a lifeless manner
   "the girl lay in her arms lifelessly" 
3. As if dead
   - deadly

See also: lifeless

• untouched
• untoughened
• untoward
• untraceable
• untracked
• untraditional
• untrained
• untrammeled
• untrammelled
• untransferable
• untranslatable
• untransmutable
• untraveled
• untravelled
• untraversable
• untraversed
• untreated
• untried
• untrimmed
• untrod
• untrodden
• untroubled
• untrue
• untruly
• untrustiness