This is the 10129th most frequent Russian word.
безжалостных
"Merciless" or "ruthless."
Describing enemies with the characteristic of being merciless.
Безжалостных врагов нужно избегать.
Ruthless enemies should be avoided.
Describing a period in history as being particularly merciless or harsh.
Она писала о безжалостных временах войны.
She wrote about the ruthless times of war.
Describing critics as extreme or harsh in their judgments.