adj.残忍的,无怜悯之心的,蛇蝎心肠,无情
The killer was merciless.
凶手残酷无情.
The man is merciless.
这人厉害极了.
Whistler, as always, was merciless.
和以往一样,惠斯勒还是那么冷酷无情。