This is the 274th most frequent Hebrew word.
קשר
Connection, tie, bond, or relationship.
In this sentence, 'קשר' refers to a relationship or bond between individuals.
יש לי קשר חזק עם חברי הוותיק.
I have a strong bond with my old friend.
Here, 'קשר' is used to mean a physical knot or fastening in a rope or similar.
הוא התיר את הקשר בחבל בקלות.
He untied the knot in the rope easily.
In this context, 'קשר' signifies a conceptual connection or relevance between ideas or topics.