would that
I wish it were the case that. Would that I earned just a bit more money so that I could start saving for a deposit on a house. A: "Do you want to come camping with us this weekend?" B: "Would that I could, but I'm afraid I have to go into the office on Saturday to finish up some work."
would that
I wish that, as in Would that I could stop working and go hiking with you. For a synonym, see if only.