圧力
あつりょく · atsuryoku · JLPT N1 · noun
stress
🗜️ 圧 (press) + 力 (force) = 圧力 (pressure, stress): the force that presses
圧 means press or pressure, and 力 means force or power. Together they name a force that presses on something, used for physical pressure and for mental stress alike.
力 — pictograph of a plow or arm muscle
力 originated as a pictograph of an ancient plow, the main tool requiring physical exertion in early agriculture. Some scholars also see it as a flexed arm showing muscle. From this concrete image it broadened to mean 'strength, power, force, effort'.