This is the 37th most frequent Turkish word.
aynı
"Same."
Here, 'aynı' is used as an adjective meaning 'same' to describe the noun 'fikri' (opinion).
Ben de aynı fikri paylaşıyorum.
I share the same opinion too.
In this sentence, 'aynı' again functions as an adjective qualifying 'yerde' (place), implying a specific location already mentioned or known.
Onun şu anda aynı yerde olduğunu düşünüyorum.
I think he/she is at the same place right now.
Here, 'aynı' modifies 'hata' (mistake), showing that a recurring or identical error occurred multiple times.