Nouns ending in -ence are usually feminine.
The suffix forms abstract nouns, often from verbs.
Is violence masculine or feminine?
laviolence
The rule behind it
97.6% of -ence nouns are feminine
In context
Je ne peux supporter sa violence plus longtemps.
I can't put up with his violence any longer.
Enfin les étudiants ont recouru à la violence.
At last, the students resorted to violence.
Personne ne déteste la violence plus que moi.
I yield to no one in abhorrence of violence.