Causal repetition (a forza di, a furia di)

To describe a result caused by doing something over and over again, use a forza di or a furia di. Both translate to "by dint of," "by constantly," or "from [doing something] so much."

Pair either expression directly with a present infinitive. They mean the exact same thing and are completely interchangeable.

From typing on the computer so much, my fingers are full of calluses.
A forza di scrivere al computer, ho le dita piene di calli.
From playing the guitar so much, he got a callus.
A furia di suonare la chitarra, gli è venuto un callo.

Placement

You can place the a forza di or a furia di phrase at the beginning of the sentence to emphasize the repeated action, or in the second half of the sentence to focus on the result.

From repeating the rule so much, I assimilated it.
A forza di ripetere la regola, l'ho assimilata.
The singer got hoarse from doing concerts so much.
Il cantante è diventato rauco a furia di fare concerti.

Wear and Tear

Because these phrases imply sheer, relentless repetition, they are frequently used to talk about physical wear and tear (logorare), structural collapse (il cedimento), or strain on relationships (incrinare).

From using this key so much, the letter wore off.
A furia di usare questo tasto, la lettera si è logorata.
From pulling so much, the rope gave way.
A forza di tirare, la corda ha ceduto.
From arguing so much, their bond weakened.
A forza di litigare, il loro legame si è incrinato.