The word croissant came from the word "crescent." Thus, because of the shape of the croissant, the word was probably borrowed from crescent. So that's how they named the word. By borrowing it from the word crescent. I hope this answer helped you.
You Need To Figure Out Two Of The Given Words That Explain/Define The Old Word. For Example 4. Maternal Would Be Described As Motherly, And Protective.