smarten

/ˈsmɑrtən/
verb
  1. To make or become more intelligent, knowledgeable, or quick-thinking.
    • The training program is designed to smarten new employees about company policies.
    • Reading challenging books can smarten your mind over time.
    • He smartened up after failing the exam and started studying regularly.
  2. To make or become neater, more attractive, or more stylish in appearance.
    • The old house was smartened up with a fresh coat of paint and new curtains.
    • He smartened his hair before the job interview.
    • She smartened her outfit with a colorful scarf and matching earrings.
Antonyms
What does "smarten" mean? | whatsthatwordmean | whatsthatwordmean