This is the 13616th most frequent Turkish word.
kurmuş
"Kurmuş" means "he/she/it has established" or "set up."
The word 'kurmuş' here indicates setting up or establishing something that is completed in the past.
O, yeni bir iş kurmuş.
He/She has established a new business.
In this example, 'kurmuş' conveys the idea of constructing or building (a foundation in this case) in a completed manner.
Bu kitabı okuyarak çok iyi bir bilgi temeli kurmuş.
By reading this book, he/she has built a very good knowledge foundation.
Here 'kurmuş' is used to imply the action of setting up a physical object, in this case, a tent, done in the past.