Learn Turkish: İlk aya oranla çevikliğin giderek artıyor. - Your agility is gradually increasing compared to the first month.

Oranla comes from oran (ratio or proportion) combined with the suffix -la (with). It requires the preceding noun to take the dative case, which is why we see aya (to the month). Together, aya oranla literally means "in proportion to the month" but is naturally translated as "compared to the month."

Could I use "göre" or "kıyasla" instead of "oranla" in this sentence?

Yes. İlk aya kıyasla and İlk aya göre both mean "compared to the first month." Oranla often implies a comparison of measurable amounts or rates, while kıyasla is a more general "in comparison with." In this context, talking about a measurable increase in agility, they are completely interchangeable.

Why does "çeviklik" change to "çevikliğin"?

Çeviklik (agility) ends in the hard consonant k. When we add the 2nd person singular possessive suffix -in to say "your agility," the k softens to a ğ (soft g) due to consonant mutation.

What is the literal meaning of "giderek" and how does it mean "gradually"?

Giderek is formed by adding the adverbial suffix -(y)erek (by doing / while doing) to the verb gitmek (to go). While it literally means "by going," it is used as a set adverb meaning "gradually," "progressively," or "increasingly" to show an ongoing, continuous change over time.