en_tn/rev/22/16.md

to testify to you

Here "you" is plural.

root and descendant of David

The words "root" and "descendant" mean basically the same thing. They emphasize that Jesus belongs to the family of David. (See: rc://en/ta/man/translate/figs-explicit and rc://en/ta/man/translate/figs-doublet).

the bright Morning Star

This refers to the bright star that appears early in the morning and indicates that daylight is coming soon. This also represents Jesus as the Messiah. (See: rc://en/ta/man/translate/figs-metaphor)