The word for sugar in Spanish is azúcar.
Here’s a simple explanation: In Spanish, the word azúcar is used to refer to the sweet, crystalline substance that we commonly use in cooking and beverages. It is a masculine noun, so you would use el azúcar when referring to it in a sentence.
For example: El azúcar es dulce. (The sugar is sweet.)
Remember that in Spanish, nouns have gender, and azúcar is one of those nouns that can be a bit tricky because it is masculine but often used with feminine articles in some regions. However, the most common and accepted usage is with the masculine article el.