he was under high pressure vs he was under a high pressure

Both phrases are grammatically correct, but they are used in different contexts. 'He was under high pressure' is more commonly used and considered more natural in English. On the other hand, 'he was under a high pressure' is less common and might sound a bit awkward to native speakers.

Last updated: March 30, 2024 • 678 views

This phrase is correct and commonly used in English.

"he was under high pressure"

This phrase is used to describe someone who is experiencing a significant amount of stress or tension.

Show examples from the web [+]

Most toxins become inert under high pressure.
The mixture is forwarded into the extrusion machine under high pressure and heat.
Irrigating plants by propelling water under high pressure as rain over the parcels.
BKB is a composition fuel manufactured from lignite/brown coal, produced by briquetting under high pressure without the addition of a binding agent.
Artefacts of even shape produced after crushing and drying of lignite, moulded under high pressure without the addition of binders.
In addition to the shower function, it also provides hydromassage by narrow water streams under high pressure coming through the nozzles.
For safe disposal, unused vials should be reconstituted with a small amount of water then sterilised under high pressure.
For safe disposal, any unused vials should be dissolved with a small amount of water and then sterilised under high pressure (autoclaved).
Amy worked long hours under high pressure, right?
Under high-pressure conditions, that is the sort of thing that can happen.
The Commission has found some key consumer problems in the home improvement sector where consumers are under high pressure to order expensive renovation works.
Put a lemon under high pressure, though, and in no time at all, all that will be left is juice and pulp.
Use with caution in the presence of combustible substances as the self-ignition temperature of most of the organic compounds in the air is considerably lower under high pressure.
Instead of waste being sealed in cement as in the past, it is now compacted in a press under high pressure and what are known as CSD-Cs are produced (Colis Standard de Déchets Compactés - standard compacted waste packages).
Both rigid and flexible pipes carrying fluids, particularly those under high pressure, must be able to withstand the foreseen internal and external stresses and must be firmly attached and/or protected against all manner of external stresses and strains;
In November, the Justice and Internal Affairs Council rejected the Commission proposal to suspend implementation of the Dublin II Regulation in Member States coming under disproportionately high pressure as a result of migration.
The mammoth flying plywood shell... might ship water under high-speed taxi pressure.
This remarkably well preserved wilderness area is already being devastated and put under high anthropogenic pressure by the recently-started construction works for the 'Kartala' ski resort on the territory of Rila Buffer.
The pressure is decreased on the magma, and the effect of that is to allow gases that are trapped under the very high pressure to... be released and bubble out.
Pipes carrying dangerous gases or liquids, and particularly those under such a high pressure that a leak could pose a danger to persons, shall not be located in the accommodation or in corridors leading to the accommodation.

Alternatives:

he was under a lot of pressure
he was under intense pressure
he was under tremendous pressure
he was under immense pressure
he was under extreme pressure

This phrase is also correct but less commonly used in English.

"he was under a high pressure"

This phrase can be used to emphasize the specific level of pressure someone is under.

Show examples from the web [+]

Most toxins become inert under high pressure.
The mixture is forwarded into the extrusion machine under high pressure and heat.
Irrigating plants by propelling water under high pressure as rain over the parcels.
BKB is a composition fuel manufactured from lignite/brown coal, produced by briquetting under high pressure without the addition of a binding agent.
Artefacts of even shape produced after crushing and drying of lignite, moulded under high pressure without the addition of binders.
In addition to the shower function, it also provides hydromassage by narrow water streams under high pressure coming through the nozzles.
For safe disposal, unused vials should be reconstituted with a small amount of water then sterilised under high pressure.
For safe disposal, any unused vials should be dissolved with a small amount of water and then sterilised under high pressure (autoclaved).
Amy worked long hours under high pressure, right?
Under high-pressure conditions, that is the sort of thing that can happen.
The Commission has found some key consumer problems in the home improvement sector where consumers are under high pressure to order expensive renovation works.
Put a lemon under high pressure, though, and in no time at all, all that will be left is juice and pulp.
Use with caution in the presence of combustible substances as the self-ignition temperature of most of the organic compounds in the air is considerably lower under high pressure.
Instead of waste being sealed in cement as in the past, it is now compacted in a press under high pressure and what are known as CSD-Cs are produced (Colis Standard de Déchets Compactés - standard compacted waste packages).
In November, the Justice and Internal Affairs Council rejected the Commission proposal to suspend implementation of the Dublin II Regulation in Member States coming under disproportionately high pressure as a result of migration.
Pipes carrying dangerous gases or liquids, and particularly those under such a high pressure that a leak could pose a danger to persons, shall not be located in the accommodation or in corridors leading to the accommodation.
Both rigid and flexible pipes carrying fluids, particularly those under high pressure, must be able to withstand the foreseen internal and external stresses and must be firmly attached and/or protected against all manner of external stresses and strains;
The pressure is decreased on the magma, and the effect of that is to allow gases that are trapped under the very high pressure to... be released and bubble out.
The mammoth flying plywood shell... might ship water under high-speed taxi pressure.
This remarkably well preserved wilderness area is already being devastated and put under high anthropogenic pressure by the recently-started construction works for the 'Kartala' ski resort on the territory of Rila Buffer.

Alternatives:

he was under a lot of pressure
he was under intense pressure
he was under tremendous pressure
he was under immense pressure
he was under extreme pressure

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he was under high pressure vs he was under a high pressure