The crossword solution for the term 'slack-jawed feeling' is AWE, which is a three letter word. AWE is an emotion that is often described as a feeling of wonder or admiration, usually in response to something majestic or powerful. It is often accompanied by a sense of respect and reverence. AWE can also be used to describe a feeling of shock or amazement, such as when someone is slack-jawed in response to something unexpected.