relentless

C2+ Topic:Describing Qualities

US /rɪˈlɛntləs/ UK /rɪˈlɛntləs/ See IPA manual

Meanings

1

adj
unceasingly harsh, intense, or determined; never letting up

The relentless heat made every afternoon unbearable.

Thesaurus

Synonyms

1 adj · unceasingly harsh, intense,... unrelenting persistent unremitting incessant unyielding merciless inexorable

Opposites

merciful yielding intermittent lenient

Word family

Derived forms relentlesslyrelentlessness

Related forms relent relenting

Appears in

Phrases (1)

See all

relentless persecution
cruel or unfair treatment that continues without easing

Adjective + noun

Etymology

From relent + -less. Relent is from Old French relenter ('to soften, dissolve'), from Latin re- (intensive) + lentare ('to bend'), from lentus ('flexible, slow, sticky').

re- Latin lentus Latin

View etymology graph ->

Topics

Describing Qualities Word Formation & Derivatives

External links

# relentless

**Type:** Word
**Level:** C2+
**Part of speech:** adj
**IPA (US):** /rɪˈlɛntləs/
**IPA (UK):** /rɪˈlɛntləs/

## Meanings
1. unceasingly harsh, intense, or determined; never letting up

## Examples
- The relentless heat made every afternoon unbearable.

## Synonyms
- unrelenting
- persistent
- unremitting
- incessant
- unyielding
- merciless
- inexorable

## Antonyms
- merciful
- yielding
- intermittent
- lenient

## Derived Forms
- relentlessly
- relentlessness

## Related Forms
- relent
- relenting

## Roots and Affixes
- Root: re-
- Root: lentus

## Etymology
From relent + -less. Relent is from Old French relenter ('to soften, dissolve'), from Latin re- (intensive) + lentare ('to bend'), from lentus ('flexible, slow, sticky').

## AI Etymology
Relentless comes from relent + -less. Relent is from Old French relenter ('to soften, dissolve'), from Latin re- (intensive) + lentare ('to bend'), from lentus ('flexible, slow, sticky'). The historical chain includes Latin re- and Latin lentus. Older glosses in the chain include "to soften, dissolve", "to bend", and "flexible, slow, sticky", which help explain the semantic range of the modern word. Morphologically, relentless is best read as compound, suffixal formation, and borrowing, yielding an English adjective shaped by both form history and later usage. In current English it functions as an adjective, with the sense "unceasingly harsh, intense, or determined; never letting up". English derivatives include relentlessly and relentlessness; related forms include relent and relenting. The result is an English adjective whose etymology preserves the older forms while supporting the word's specialized modern meaning.

## Topics
- Describing Qualities
- Word Formation & Derivatives

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