OET interlinear NUM 16:33

uW Translation Notes:

Note 1 topic: figures-of-speech / metaphor

וַ⁠יֵּ֨רְד֜וּ הֵ֣ם וְ⁠כָל־אֲשֶׁ֥ר לָ⁠הֶ֛ם חַיִּ֖ים שְׁאֹ֑לָ⁠ה

and,they_went_down they and=all which/who to/for=them life(pl) Sheol,to

Here, the author is speaking of death as if it were going to a place called Sheol that these people would enter while still alive. Your language may have a comparable expression that you can use in your translation, or you could state the meaning plainly. See how you translated the similar clause in verse 30. Alternate translation: [and it as if they arrived, they and all that was to them, at the place of the dead while they were still alive] or [and they died, they and all that was to them, after they were buried instead of before]

Note 2 topic: figures-of-speech / personification

וַ⁠תְּכַ֤ס עֲלֵי⁠הֶם֙ הָ⁠אָ֔רֶץ

and,it_covered over,them the=earth/land

The author is speaking of the earth as if it were a living thing that could cover people. If it would be helpful in your language, you could state the meaning plainly. Alternate translation: [and they were covered with earth]