keystone

Noun

1. The top stone of an arch.
2. Something on which other things depend for support.
3. A native or resident of the American state of Pennsylvania.
4. A retail price that is double the cost price; a markup of 100%.
5. The combination of the shortstop and second baseman.

Verb

1. (transitive) To distort (an image) by projecting it onto a surface at an angle, which for example causes a square to look like a trapezoid.
2. (transitive) To double the cost price in order to determine the retail price; to apply a markup of 100%.

Pronounced as (IPA)

/ˈkiː.stəʊn/

Etymology

From key + stone.
Definition 4 (retail) possibly originated in the jewelry industry in the magazine called "Jewelers' Circular-Keystone".

Synonyms

headstone

🪦

lynchpin

key

🔑

anchor

⚓

backbone

cornerstone

linchpin

main

mainstay

essential part

crowbar

foundation

gist

groundwork

axle

issue

axis

lever

head stone

aspect

choke stone

main point

coigne

major

point

principle

quoin

substructure

bar

base

capstone

coign

key-stone

Translations

chiave di volta

Schlussstein

clave

🔑

clef de voûte

zwornik

clé de voûte

sluitsteen

klucz

chave

🔑

clau de volta

Schlußstein

pedra angular

حجر الأساس

échine

Scheitelstein