• Bengali Word নির্দয় English definition (adjective) 1 pitiless; unkind; cruel; merciless; hard-hearted. 2 hard; severe; excessive; rigorous. 3 violent; fierce; ferocious. নির্দয়তা (noun) cruelty; mercilessness; hard-heartedness; savagery; brutality; ruthlessness; severity; rigour.