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Discover LudwigSuggestions(5)
"the primary source" is a correct and usable phrase in written English.
It can be used to refer to the main or most important source of information or evidence in a sentence. For example: - "When writing a research paper, it is important to cite the primary sources used in your study." - "The historian relied on the primary source documents from the time period to accurately depict the events." - "The primary source of income for the company comes from its successful online sales platform."
Exact(59)
The primary source was the imprisoned dictator himself.
Was that structure informed by the primary source material?
What is the primary source of mercury pollution?
Newspapers remain the primary source of news-gathering in America.
The primary source of the play was Raphael Holinshed's Chronicles.
The primary source reveals: I got good grades.
Livestock ranching is the primary source of agricultural income.
The primary source, where the Ebola virus hangs out naturally, is still not completely clear.
But the primary source for the sculpture's imagery was Dante's "Divine Comedy".
This is the primary source of income for myself and my [four] workers," he says.
Football is the primary source of income for most athletic departments.
More suggestions(17)
the primordial source
the fundamental source
the primary supply
the foremost source
the senior source
the primary news
the basic source
the overriding source
the major source
the primary fount
the primary revenue
the primary origin
the primary information
the preliminary source
the key source
the premier source
the predominant source
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com