thankless

Từ điển WordNet v3.1 - WordNet Dictionary

adjective

1. not feeling or showing gratitude
- ungrateful heirs
- "How sharper than a serpent's tooth it is / To have a thankless child!"- Shakespeare
• Syn:
ungrateful, unthankful
• Ant:
grateful (for: ungrateful)
• Similar to:
unappreciative
• Derivationally related forms:
ungratefulness (for: ungrateful)
2. not likely to be rewarded
- grading papers is a thankless task
• Syn:
unappreciated, ungratifying
• Similar to:
unrewarding

• Từ đồng nghĩa / Synonyms:
  unappreciated, ungratifying, ungrateful, unthankful
• Từ trái nghĩa / Antonyms:
  grateful, thankful