The ideas of "clean" and "purify" represent being acceptable to God and making something acceptable to God. The ideas of "unclean," "defile," and "impurity," represent not being acceptable to God, making something unacceptable to God, and the state of being unacceptable to God. (See: [[rc://en/ta/man/jit/figs-metaphor]]) (See: [[rc://en/ta/man/jit/figs-metaphor]])
Here the phrase "be cut off" means to be disowned and sent away. See how you translated this in [Numbers 9:13](../09/13.md). Alternate translation: "That person must be sent away" or "you must send that person away" (See: [[rc://en/ta/man/jit/figs-metaphor]] and [[rc://en/ta/man/jit/figs-activepassive]])
This can be stated in active form. Alternate translation: "No one has sprinkled the water for impurity on him" (See: [[rc://en/ta/man/jit/figs-activepassive]])