Eckpfeiler

noun
  1. A corner pillar or cornerstone, typically used in architecture to provide structural support at the corner of a building. noun
    The architect emphasized the importance of the Eckpfeiler in maintaining the stability of the structure.
    During the renovation, they discovered that the original Eckpfeiler was made of solid granite.
  2. A fundamental principle or key element that supports a larger concept or system. noun
    Trust is often considered an Eckpfeiler of successful relationships.
    The Eckpfeiler of their business strategy was innovation and customer satisfaction.