This is the 597th most frequent Hebrew word.
לחץ
Pressure; stress.
Here 'לחץ' is used to denote psychological stress or tension.
הוא חש לחץ כאשר ניגש למבחן.
He felt pressure when approaching the exam.
In this sentence, 'לחץ' refers to a physical condition, specifically blood pressure.
המטופל סבל מלחץ דם גבוה.
The patient suffered from high blood pressure.
Here 'לחץ' is describing a mechanical force, in this case, water pressure.