hardness of hearing meaning in Hindi

Examples

1. He resigned as professor in 1806 due to hardness of hearing, a problem he had acquired in connection with a chemical experiment.
2. He recommends cedria to ease the pain in a toothache, as an injection in the ear in case of hardness of hearing, to kill parasitic worms, as a preventative for impregnation, as a treatment for phthiriasis and porrigo, as an antidote for the poison of the sea hare, as a liniment for elephantiasis, and as an ointment to treat ulcers both on the skin and in the lungs.