This is the 2352nd most frequent Spanish word.
testigo
Witness.
In this sentence, 'testigo' is used as a noun meaning 'witness' to indicate someone who saw or experienced events personally.
Ella fue testigo de los eventos aquella noche.
She was a witness to the events that night.
Here, 'testigo' is used again as a noun referring specifically to a legal witness who presents evidence in a court of law.
El testigo entregó su declaración en el juicio.
The witness provided their testimony during the trial.
In this case, 'testigo' is used metaphorically as a noun denoting evidence or proof for an abstract concept, showing the figurative extension of its meaning.