This is the 202nd most frequent Turkish word.
verdiği
"Verdiği" means "that he/she/it gave" or "that is given" depending on the context.
Here, 'verdiği' functions as a possessive relative participle, modifying 'sözleri' to mean 'the promises given by him.'
O, verdiği sözleri hep tutar.
He always keeps the promises he has given.
In this sentence, 'verdiği' serves as a relative participle, describing 'ilaç' as 'the medicine given by the doctor.'
Doktorun verdiği ilaç beni iyileştirdi.
The medicine given by the doctor healed me.
Here, 'verdiği' acts again as a relative participle, indicating possession and modifying 'karar' to mean 'the decision made by him.'