Collins COBUILD Advanced Learner's English Dictionary - relentless

1. Something bad that is relentless never stops or never becomes less intense. The pressure now was relentless. ADJ • relentlessly The sun is beating down relentlessly. ADV 2. Someone who is relentless is determined to do something and refuses to give up, even if what they are doing is unpleasant or cruel. Relentless in his pursuit of quality, his technical ability was remarkable... ADJ • relentlessly She always questioned me relentlessly. ADV