This is the 13231st most frequent Turkish word.
kaynaktan
"From the source"
Here, 'kaynaktan' refers to the source from which the information is extracted, using the ablative case to denote 'from a source'.
Bu projedeki bilgiler güvenilir bir kaynaktan alınmıştır.
The information in this project has been taken from a reliable source.
In this sentence, 'kaynaktan' indicates the origin of the income or where the tax deduction is applied, again in the ablative case meaning 'from the source'.
Arkadaşımın elde ettiği gelir kaynaktan vergi kesintisi yapılarak hesaplandı.
The income my friend received was calculated after a tax deduction from the source.
Here, 'doğal kaynaktan' refers to the source as a natural spring, and 'kaynaktan' conveys the idea of originating from that spring.