Used when referring to improving how things look, often related to fashion or orderliness. He decided to smarten up his room before the guests arrived.
Pro Tip 2/3
Subtle Transformation
Implies making small yet impactful changes to enhance visual appeal. After repainting, the cafe smartened up and drew more customers.
Pro Tip 3/3
Outfit Enhancements
Often used to suggest dressing more formally or sophisticatedly, especially for important events. To impress at the interview, James smartened up by wearing a suit.