This is the 74th most frequent Turkish word.
sahip
Owner.
The word "sahip" is used here to indicate possession or ownership of the mentioned object.
O evin yeni sahibidir.
He is the new owner of the house.
Here, "sahip olduğunuz" expresses the state of having or possessing values.
Sahip olduğunuz değerlere önem verin.
Value the things you possess.
In this context, "sahip çıkmak" is a phrase meaning to take responsibility for or to look after something.