en_tn/rev/21/05.md

the Alpha and the Omega, the Beginning and the End

These two phrases share similar meanings and are combined to emphasize that God is eternal. (See: rc://en/ta/man/translate/figs-doublet and rc://en/ta/man/translate/figs-merism).

the Alpha and the Omega

See how you translated this in Revelation 1:7.

To the one who thirsts...water of life

This means God will freely give eternal life to any person that really wants it. (See: rc://en/ta/man/translate/figs-metaphor)