'Deeply' in the Bible

I am deeply angry with the nations who are complacent, with whom I was only a little displeased but they made things worse!"

Then they will mourn for him, as for an only son. They will grieve bitterly for him, as for a firstborn son. At that time, Jerusalem will mourn deeply, like the mourning about Hadad-rimmon that took place in the plain of Megiddo.