Question

build up

Accepted Answer

1 to
  increase (the size, extent of): The traffic begins to build up around five
  o'clock. They built the wall up gradually.(fig) Don't build up the child's
  hopes - he may not get a present. 2 to strengthen gradually (a business,
  one's health, reputation etc): his father built up that grocery business from
  nothing. Good food and fresh air will help build the child up. 3 to speak
  with great enthusiasim about (someone): They built him up until I couldn't
  wait to meet him

Build Built Increase Size Extent Traffic Begins O'clock