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keystones

NOUN

essence, theme

Synonyms

WEAK

basic idea basis center core cornerstone criterion crux gist heart idea kernel linchpin mainspring marrow measure motive nub pith principle root source spring standard substance

NOUN

base

Synonyms

STRONGEST

cornerstone

STRONG

crown foundation headstone mainstay principle root support wedge

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

He made exquisite, hand-rubbed wooden keystones, each representing the central stone at the summit of an arch.

From Los Angeles Times • Nov. 25, 2025

"Independence and transparency are the keystones of our work," says Prof Vieira.

From BBC • Mar. 24, 2023

The island’s semiconductor industry is an increasingly indispensable node in the global supply chains for smartphones, cars and other keystones of modern life.

From New York Times • Aug. 12, 2022

Replacing screws outright through the use of keystones, as Dell is proposing to do for Concept Luna’s screen and keyboard assembly, could make DIY repair even simpler.

From The Verge • Dec. 14, 2021

The sun and moon on each 47 side of the cross are, as we shall see in the fifth Chapter, constantly employed on the keystones of Byzantine arches.

From The Stones of Venice, Volume II (of 3), by Ruskin, John