Not a hard rule, but the strongest single signal German gives you. Most nouns ending in -e are die. Learn the pattern, then learn the handful of exceptions, and you'll almost never guess wrong.
The strong tendency
A large majority of German nouns ending in -e are feminine. This includes some of the most common everyday words:
| Word | Meaning |
|---|---|
| dieSchule | school |
| dieStraße | street |
| dieSprache | language |
| dieKüche | kitchen |
| dieLampe | lamp |
| dieBrücke | bridge |
| dieGrenze | border / limit |
| dieFarbe | color |
The exceptions worth knowing
This is not an absolute rule, so the exceptions matter. The most common ones are masculine nouns from the so-called weak noun group, mostly living beings:
- derName → name
- derJunge → boy
- derKollege → colleague (male)
- derKunde → customer (male)
- derLöwe → lion
- derAffe → monkey / ape
And a small group of neuter nouns:
- dasAuge → eye
- dasEnde → end
- dasInteresse → interest
How to use this
The strategy is simple: default to die for any new -e noun you encounter. You'll be right the vast majority of the time. When you then consciously learn the masculine and neuter exceptions, most of which refer to male people or animals, or are loan words, the pattern becomes nearly airtight.
See an -e ending, your first guess is die. It won't always be right, but it will be right most of the time. Pair it with the short exception list and you have a working rule, not a coin flip.