To weaken or injure (someone or something) by gradual, secret, or indirect means.

धीरे-धीरे कमजोर करना

English Usage: His constant criticism was aimed at undermining her confidence.

Hindi Usage: उसकी लगातार आलोचना का उद्देश्य उसकी आत्मविश्वास को धीरे-धीरे कमजोर करना था।

The act of weakening or damaging something, especially systematically or gradually.

कमजोर करना

English Usage: The undermining of support for the project led to its failure.

Hindi Usage: परियोजना के लिए समर्थन को कमजोर करने से इसकी विफलता हुई।