This is the 8587th most frequent Turkish word.
r
In Turkish, "r" is the letter "R" in the alphabet.
Here, 'r' is part of the verb 'verdım' (I gave), originating from 'vermek' (to give), playing the role of the verb's root to which inflections are applied.
Bu kitabı Peter'e verdim.
I gave this book to Peter.
In this sentence, 'r' is part of the word 'ilerliyordu' (was moving forward), which derives its meaning partly from the root verb 'ilerlemek' (to progress).
Sabit bir hızla ilerliyordu.
It was moving forward at a constant speed.
In this example, 'r' appears in the word 'parlak' (bright), which is an adjective describing the noun 'öğrenci' (student).