An article is the small word before a noun that shows its gender, number, and case. In English, this word never changes: you say "the" whether you mean the man, the woman, or the child, and "a/an" no matter what follows. German is different — the article itself changes form to match the noun's gender, so "the" becomes der, die, or das depending on which noun it belongs to. German has three types of article in total, and each one changes form depending on the noun's gender.
| Masculine | Feminine | Neuter | Plural | |
|---|---|---|---|---|
| Definite | der | die | das | die |
| Indefinite | ein | eine | ein | — |
| Negative | kein | keine | kein | keine |
Which article means "a/an" for a feminine noun?