relentless

词形变化：

副词: relentlessly | 名词: relentlessness |

词义辨析：

同义:

a.严酷的; 坚定的

harsh

unsympathetic

merciless

heartless

cruel

strict

firm

inflexible

unyielding

uncompromising

persevering

persistent

steadfast

hard

without pity

同义参见:

rigorous

continual

constant

marble

violent

inexpiable

ceaseless

反义参见:

compassionate¹