This is the 4327th most frequent Turkish word.
teklifi
"Teklifi" means "the offer" or "the proposal" in English.
Here, 'teklifi' is used as a possessive noun (Ali'nin teklifi) referring to 'Ali's offer'.
Ali'nin iş teklifi oldukça cazipti.
Ali's job offer was quite attractive.
In this sentence, 'teklifi' indicates 'the offer' (possessive form related to arkadaşım, meaning 'my friend').
Arkadaşımın teklifi üzerine yeni bir yolculuğa çıktık.
We embarked on a new journey based on my friend's offer.
'Teklifi' is used here as the object referring to 'the proposal' or 'the offer' being considered.