gratuitous

Từ điển WordNet v3.1 - WordNet Dictionary

adjective

1. without cause (Freq. 1)
- a gratuitous insult
• Similar to:
unmerited
2. costing nothing
- complimentary tickets
- free admission
• Syn:
complimentary, costless, free, gratis
• Similar to:
unpaid
3. unnecessary and unwarranted
- a strikers' tent camp...was burned with needless loss of life
• Syn:
needless, uncalled-for
• Similar to:
unnecessary, unneeded

• Từ đồng nghĩa / Synonyms:
  needless, uncalled-for, complimentary, costless, free, gratis(p)