Water that has dried up from a lake or a river cannot return, and once a person dies or grows old, he cannot become young again. (See: [[rc://en/ta/man/jit/figs-simile]])
The phrases "becomes dry" and "dries up" mean translate words that mean the same thing. If translating both phrases would be awkward in your language, you can leave one of them untranslated. (See: [[rc://en/ta/man/jit/figs-doublet]])