pitilessly

adverb
1
in a way that shows no pity; in a cruel way
بی‌رحمانه, سنگدلانه, بی‌شفقتانه
synonym callously
2
in a very cruel or severe way, that never ends
بی‌رحمانه, سنگدلانه, قسیانه, ظالمانه
synonym relentlessly