This is the 214th most frequent Turkish word.
ortak
"Ortak" means "partner" or "common" in English.
Here, 'ortak' is used as an adjective meaning 'joint' or 'shared', describing the collaborative nature of an action.
Bu işi arkadaşım ile ortak yürütüyoruz.
We are jointly running this business with my friend.
In this sentence, 'ortak' is used as a noun, meaning 'partner', specifically in a business context referring to shared ownership or collaboration.
O, benim uzun zamandır ortak olduğum biridir.
He/she is someone I have been a business partner with for a long time.
Here, 'ortak' again serves as an adjective meaning 'shared' or 'common', modifying 'goal' to indicate mutual agreement or interest.