A spherical object made of iron, often used in games or as a weight.

A metaphorical term used to describe someone who is strong or resilient.

मजबूत या दृढ़ व्यक्ति

English Usage: She has the heart of an iron ball, never backing down in the face of adversity.

Hindi Usage: उसके पास लोहे की गेंद का दिल है, adversity का सामना करने में कभी पीछे नहीं हटती।