The phrase "a severe source of" is correct and usable in written English.
It can be used to describe something that causes significant problems or difficulties.
Example: "The drought has become a severe source of concern for farmers in the region."
Alternatives: "a major cause of" or "a significant source of".
The new thermal sensor designs proposed here, seek to eliminate the most severe source of error in conventional single-element hot-film sensors – which is indirect heat transfer to the fluid flow through the solid substrate.
The most important and severe sources of stress were staying in hostel, high parental expectations, vastness of syllabus, tests/exams, lack of time and facilities for entertainment.
Alexander at the same age had conquered the known world, while Caesar was just a minor Roman official, a source of severe chagrin to the ambitious future autocrat.
In contrast, when grown in minimal media supplemented with glucose, glycerol, or acetate as carbon source, a severe growth defect of the pdhR deletion mutant was observed.
The resulting travel log is impressive, and is the source of a severe case of itchy feet in your correspondent.
A further four refugee centres, it said, would be set up in a bid to improve severe overcrowding, a major source of tensions in the camps.
Metastases to the spine are a common source of severe pain in cancer patients.
The salty floodwaters are spoiling fresh water sources, and a severe shortage of drinking water has already led to an outbreak of diarrhoea – mainly in the Satkhira and Khulna districts – that has affected over 4,000 people.
In a severe accident, evaluation of the source term is demanding to alleviate the radiological hazards to public risk.
RUSSIA'S ability to deal with its legendarily severe winters is a source of national pride.
