Rule for feminine · die
-ie → die · 1.1% of nouns
Many nouns ending in -ie are feminine, such as Familie (family), Partie (round/game) and Studie (study). This pattern covers about 1.1% of the frequent nouns in our set, so it's not the most common ending, but it's still worth knowing, especially for words borrowed from French or Latin. Their plural is usually formed with -n (Familien, Partien, Studien), another hint that they're feminine. Watch out for Knie (knee) though - it also ends in -ie, but it's neuter (das Knie), so remember it as a separate exception.