pillar
noun [ C ] uk/ˈpɪl.ər/ us/ˈpɪl.ɚ/
（建筑物的）柱子，支柱;墩
a strong column made of stone, metal, or wood that supports part of a building
A row of reinforced concrete pillars supports the bridge. 一排钢筋混凝土柱子支撑着桥梁。
figurative a pillar of smoke/flame 烟／火柱
pillar of something 重要成员；栋梁，中坚
a very important member or part of a group, organization, system, etc.
Mrs Maple is a pillar of the local church. 梅普尔夫人是当地教会的骨干。
Equality is one of the pillars of socialism. 平等是社会主义理论的重要组成部分之一。
Ragulin was a pillar of the hockey team.
My mother is a pillar of strength to everyone in the family.
They both identified shared dinners as a pillar of their marriage.
Idiom
from pillar to postidiom 四处奔走，到处奔波
If someone goes from pillar to post, they are forced to keep moving from one place to another.
My parents were always on the move and so my childhood was spent being dragged from pillar to post. 父母总是不停地搬家，所以我的童年是在四处迁移中度过的。