The term BOX OPENER can be summarized by two crossword solutions: PANDORA (7 letters) and THINKOUTSIDETHE (15 letters). PANDORA is a figure from Greek mythology who opened a box that released all the evils of the world. THINKOUTSIDETHE is an idiom that means to consider alternatives or to think creatively. Both of these terms can be used to describe someone who opens boxes, as they suggest looking for new ways to approach a problem or task.