vi.

1. 作證[（+for/against/to）]
   The next witness will testify for the defense.

   下一個證人將為被告人作證。

2. 表明，證明[（+to）]
   The excellence of Shakespeare's plays testifies to his genius.

   莎士比亞戲劇的卓越證明了他的天才。

3. 向上帝懺悔
   Reformed sinners testify.

   受感化的罪人向上帝懺悔。

vt.

1. 證實[+that]
   The witness testified that he had seen the man shoot at his victim.

   證人作證說他看到那男人向其受害者開槍。

2. 表明，證明[+that]
   Her deep sighs testified her sadness.

   她的一聲聲長歎表明她的悲傷。

3. 聲明
   He testified his faith in Christianity openly.

   他公開聲明信仰基督教。

v.

1. give evidence as a witness in a law court.
2. serve as evidence or proof of something.