Learn French: À force d'entendre cet accent, je le prononce bien. - By dint of hearing this accent, I pronounce it well.

It emphasizes that the result happens specifically because of the repetition or intensity of the cause. It translates to "by dint of" or "through repeatedly". You wouldn't get this strong sense of repetition if you just used a simple cause phrase like parce que.

Why is entendre in the infinitive form here?

Prepositions in French, like the de in à force de, are always followed by the infinitive form of a verb rather than a conjugated verb. Notice how it contracts to d' before the vowel in entendre.

Why is it cet accent instead of ce accent?

Even though accent is masculine, it begins with a vowel. French uses cet instead of ce before masculine singular nouns starting with a vowel or a mute H to avoid two vowel sounds clashing.

What is the grammatical role of le in je le prononce?

It is a direct object pronoun standing in for cet accent. In French, these pronouns must be placed immediately before the conjugated verb, giving us je le prononce instead of translating the English word order directly.