abutment        
noun  architecture specialized uk/əˈbʌt.mənt/ us/əˈbʌt.mənt/
 [ C ]桥台;拱座 
a structure that is built to support an arch (= a curved top on two supports, that holds the weight of something above it), or the end of a bridge
  [ U ]使用桥台或拱座提供的支撑 
the process of supporting something using an abutment