義塚

义冢
yìzhǒng
  1. potter's field
  2. pauper's grave

CEDICT

burial ground for the remains of unidentified persons

Wiktionary

掩埋無主屍體的墳墓。

重編國語辭典

Entry Composition

1 義 yì
  1. justice
  2. righteousness
  3. meaning
  4. foster (father etc)
  5. adopted
  6. artificial (tooth, limb etc)
  7. relationship
  8. friendship
2 塚 zhǒng burial mound (variant of 冢 zhǒng)