This is the 257th most frequent Turkish word.
ek
"Ek" in Turkish means "suffix," "addition," or "appendage."
Here, 'ek' means 'additional,' describing a supplementary file.
Ek dosyayı kontrol ettim.
I checked the additional file.
Here, 'ek' means 'affix,' a grammatical element attached to a word.
Kelimeye bir ek eklendi.
An affix was added to the word.
Though not directly 'ek,' the derived word 'eklenti' refers to an 'addon,' implicating an 'addition.'