This is the 11834th most frequent Turkish word.
gerisinde
"Gerisinde" means "behind" or "at the back of" in English.
In this sentence, 'gerisinde' implies 'falling behind' others in a metaphorical sense, concerning progress or achievement.
Herkesin gerisinde kalmaktan korkuyorum.
I am afraid of falling behind everyone.
Here, 'gerisinde' is used to express a position or status of being surpassed by the opponent, applied to competition or scoring.
Bu maçta rakibimizin gerisinde kaldık.
We fell behind our opponent in this match.
The word 'gerisinde' is used here to mean 'behind' in a spatial sense, referring to the position of the key in relation to the books.