s not to be placated or appeased or moved by entreaty
s harsh
s never-ceasing
a. 不怜悯的, 无情的, 冷酷的
1. She showed unrelenting determination in her studies.
她在学习中表现出不屈不挠的决心。
2. The unrelenting rain caused the river to overflow.
持续不断的雨水导致河水泛滥。
3. His unrelenting support helped her through tough times.
他不懈的支持帮助她度过了艰难时期。