Learn Turkish: Onlar sınırsız güç için kıyasıya mücadele ettiler. - They struggled fiercely for unlimited power.

This suffix attaches to a verb to show an action done to an extreme limit. Here, it attaches to the root kıy- (to show no pity) and adds -asıya. The resulting adverb literally means "to the point of showing no pity," which is used in Turkish to mean "fiercely" or "mercilessly."

What does the base verb kıymak mean on its own?

The verb kıymak means to chop or mince, but metaphorically it means to have no mercy on someone or to ruthlessly sacrifice them. For example, cana kıymak means to take a life. This extreme lack of mercy is what gives kıyasıya its intense meaning in this sentence.

Can I use kıyasıya with any verb to mean "fiercely"?

Not usually. Over time, kıyasıya has become a set adverb that almost exclusively pairs with actions related to fighting, struggling, or competing. kıyasıya mücadele etmek (to struggle fiercely) and kıyasıya rekabet etmek (to compete fiercely) are very common collocations, but you wouldn't use it to say you studied or worked fiercely.

How is the word sınırsız formed?

It is built from the noun sınır, which means limit or border, and the privative suffix -sız, which means without or -less. Together they form an adjective meaning limitless or unlimited.