the joint of a finger

a part of a tool or instrument

एच का हिस्सा

English Usage: The mechanism was adjusted with a knuckle joint.

Hindi Usage: यंत्र को एक एच का जोड़ के साथ समायोजित किया गया।

to strike with the knuckles

to bend over slightly in submission

थोड़ा झुकना

English Usage: She chose to knuckle under when faced with overwhelming pressure.

Hindi Usage: उसने जबरदस्त दबाव के सामने थोड़ा झुकना चुना।