This is the 180th most frequent Hindi word.
मर
Die.
Here, 'मर' (mar) is used to signify death in a concrete situation.
वह दूषित पानी पीकर मर गया।
He died after drinking contaminated water.
Here, 'मर' (mar) is used colloquially to express despair or being in trouble.
अगर मैंने देर की तो मेरी गाड़ी छूट जाएगी। मर गया मैं!
If I am late, I'll miss my train. I am doomed!
In this sentence, 'मर' (mar) metaphorically implies an emotional experience that deeply affected him.