该信件未署名。

This letter bears no signature.

Source: Tatoeba

Sentence Composition

1 该 gāi
  1. should
  2. ought to
  3. probably
  4. must be
  5. to deserve
  6. to owe
  7. to be sb's turn to do sth
  8. that
  9. the above-mentioned
2 信件 xìnjiàn letter (sent by mail)
3 未 wèi
  1. not yet
  2. did not
  3. have not
  4. not
  5. 8th earthly branch: 1-3 p.m., 6th solar month (7th July-6th August), year of the Sheep
  6. ancient Chinese compass point: 210°
4 署名 shǔmíng to sign (a signature)