There are two types of sexually immoral women. The "prostitute" is unmarried, "another man's wife" is married. Together they form a merism for any kind of sexually immoral woman. (See: [[rc://en/ta/man/jit/figs-merism]])
The word "pit" is a metaphor for what happens to men who sleep with prostitutes. Alternate translation: "sleeping with a prostitute is like falling into a deep pit" (See: [[rc://en/ta/man/jit/figs-metaphor]])
Doing evil for which one will be punished is spoken of as falling into a narrow place from which one cannot escape. Alternate translation: "Sleeping with another man's wife is like falling into a narrow well" (See: [[rc://en/ta/man/jit/figs-metaphor]])