'high-pressured' originates from the combination of 'high' and 'pressure', where 'high' meant 'great in amount or degree' and 'pressure' referred to 'the continuous physical force exerted on or against an object'.

'high pressure' transformed into the adjective 'high-pressured' to describe situations or environments characterized by high pressure.

Initially, it meant 'subjected to high physical pressure', but over time it evolved to describe stressful or intense situations.