pillar

US /ˈpɪl.ɚ/
UK /ˈpɪl.ɚ/
"pillar" picture
1.

a tall vertical structure of stone, wood, or metal, used as a support for a building, or as an ornament or monument

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The ancient temple was supported by massive stone pillars.
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A memorial pillar was erected in honor of the fallen soldiers.
:
columnpostsupportpropupright
2.

a person or thing regarded as providing essential support or a crucial element to something

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She was a pillar of strength for her family during difficult times.
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Education is a key pillar of a thriving society.
:
mainstaybackbonefoundationlinchpincornerstone
:
from pillar to post