What is the Hebrew word for binding?

Answer 1

to bind (to another person, as in friendship) = קשר (kashar)

to bind (a book), or to tie something on yourself = כרך (karakh)

to bind (as in an agreement) = kheeyev (חייב)

loose (adjective) = rafoo-ee (רפוי)

Answer 2

binding = akidá (עקידה)