La palabra del día: Testigo

Noun. From the Latin testis, head. The one who gives his head/face. Person who testifies or attests something. Still today in Spanish the expression dar la cara, tho give the face, means both to face the consequences and to show one’s own face.
Please note that the female forms of this noun is la testigo and las testigos.
The verb is testimoniar: to testify; the adjective is testimonial, e.g: declaración testimonial: witness statement.
There is another noun with the same root: el/un testimonio; which apart from meaning witness statement it is also the word used in the legal field to speak about a copy of a document, e.g: Adjunto el testimonio de la escritura: I am attaching the copy of the deed. It makes sense as a copy simply testifies the original document. dc