Showing no pity or compassion; merciless or ruthless.
裁判官の判決は無慈悲で、被告を救う余地はなかった。
The judge's ruling was merciless and left no room to save the defendant.
彼は試合で無慈悲に相手を追い詰めた。
He ruthlessly pressed his opponent during the match.
無慈悲な決断が、チームの士気を下げた。
The merciless decision lowered the team's morale.