undergird       
verb [ T ]  formal uk/ˌʌn.dəˈɡɜːd/ us/ˌʌn.dɚˈɡɜ˞ːd/
 在底部加固;形成…的基础;加强,支撑
to support something by forming a strong base for it
  These are the four major theories that undergird criminal law. 这是构成刑法基础的四大理论。 
 - More examples
 - Congress is unlikely to give him the second half of a $700 billion rescue fund he is seeking to undergird the economy.
 - Growth has been undergirded by strong domestic demand, low inflation, and solid consumer and investor confidence.
 - The institute specializes in professional training in a number of fields, undergirded by language and cross-cultural communication training.