relentless

Imagine a wave crashing against the shore again and again, never pausing, never giving up. That's relentless. It describes something that keeps going with steady force or determination, even when there are obstacles. A relentless rainstorm does not let up for days; a relentless detective will not stop until they solve the case. Sometimes it can feel exhausting to be on the receiving end of something relentless. Think of a determined athlete pushing through pain; their training is relentless.

The word relentless describes something that shows no sign of stopping, easing up, or giving way. It is built from relent, which means to become less severe or to soften, so relentless carries the idea of not softening or not letting up. This gives the word a sense of steady pressure or determination.

You might describe a natural phenomenon as relentless: "The relentless heatwave scorched the farmland." Or you could use it to characterize someone's determination: "Her relentless pursuit of justice finally led to a breakthrough in the case." It's often used with negative connotations, suggesting something overwhelming or exhausting—like a relentless stream of emails. However, it can also be admiring, highlighting admirable perseverance. A relentless innovator continues to push boundaries despite setbacks.

Think about Sisyphus from Greek mythology, eternally rolling a boulder uphill only for it to roll back down. His task is famously relentless.

So, if something keeps going and going, refusing to quit or lessen its intensity, you're likely dealing with something truly relentless—a force that simply won't give in.