unaccompanied

Adjective

• (of a state or an event) taking place without something specified occurring at the same time
  • a headache unaccompanied by other symptoms
    

• playing or singing without accompaniment
  • the soloist sang unaccompanied
    

• being without an escort

Adverb

• without anybody else or anything else
  • the child stayed home alone
    
  • the pillar stood alone, supporting nothing
    
  • he flew solo
    

Related words

• Synonyms: 
  alone , solo
• Antonyms: 
  accompanied , attended