Is the word any singular or plural?

We use some when we are talking either about more than one or about something we cannot count. Some = an amount/number of. Eg some sugar.

Any is used instead of some in questions and after negatives. Eg Do you want any rice. No I don't want any rice.

Some and any are not singular or plural Words themselves but are used with plural nouns or less commonly with singular nouns.

Some and any can be determiners, pronouns or adverbs.