keystone
keystone · keystones · keystoned · keystoning
To distort by projecting it onto a surface at an angle, which for example causes a…To distort (an image) by projecting it onto a surface at an angle, which for example causes a square to look like a trapezoid.
/ˈkiː.stəʊn/
» You are the keystone of this business.
Meaning
2 senses(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.
(transitive)To double the cost price in order to determine the retail price; to apply a markup of 100%.
Examples
6 sentencesYou are the keystone of this business.
Sex appeal is the keystone of our civilization.
Salmon are a keystone species.
Bison is a keystone species.
Environmentalists are opposing the Keystone XL pipeline.
Origin
From key + stone.From key + stone.
Wiktionary, CC BY-SA 4.0 · source
Forms
keystones, keystoning, keystoned, keystonedLessons for this word
3 lessons- A1Present simple — Because it is a verb
- A1Past simple, regular verbs — Because of its past form
- A2Present perfect: introduction — Because of its past participle