What word is a plural, but when you add an "S" to the end, it becomes singular?

What word is a plural, but when you add an "S" to the end, it becomes singular?

Other Difficult Riddles

This thing runs but cannot walk, sometimes sings but never talks. Lacks arms, has hands; lacks a head but has a face.

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Long legs, crooked thighs, little head, and no eyes.

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What can you share and still have all for yourself?

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What is it something that you always have but you always leave behind?

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Five hundred begins it, five hundred ends it. Five in the middle is seen. First of all figures, the first of all letters. Take up their stations between. Join all together, and then you will bring before you the name of an eminent king.

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Riddle of the Day

Jul 22, 2026

This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.

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