precatory
Concise Oxford English Dictionary © 2008 Oxford University Press:
precatory /ˈprɛkət(ə)ri/
▶adjective formal relating to or expressing a wish or request.
■ Law (in a will) expressing a wish or request of the testator but not necessarily binding.
– origin C17: from late L. precatorius, from precat-, precari ‘pray’.
'precatory' also found in these Oxford entries:

