Nouns ending in -té are usually feminine.
The suffix marks an abstract quality.
Is liberté masculine or feminine?
laliberté
The rule behind it
91.3% of -té nouns are feminine
In context
Nous devons défendre notre liberté coûte que coûte.
We must defend our freedom at all cost.
La liberté est le souffle de la vie.
Freedom is the breath of life.
Le prisonnier a été remis en liberté hier.
The prisoner was set at liberty yesterday.