This is the 726th most frequent Turkish word.
elinde
"In (his/her/its) hand."
In this sentence, 'elinde' means 'in his hand' to indicate possession or location.
Çocuk, elinde bir balon tutuyor.
The child is holding a balloon in his hand.
In this usage, 'elinde' metaphorically means 'in your control' or 'ability to handle'.
Bu kadar sorumluluğun altına girmek elinde değil.
Taking on so many responsibilities is not under your control.
Here, 'elinde' refers to 'in his possession' metaphorically, indicating something available or owned.