relentless

IPA/rɪˈlentləs/
KK[rɪlˈɛntlɪs]IPA/rɪˈlentləs/

relentless — adjective

  • relentlesspositive
  • more relentlesscomparative
  • most relentlesssuperlative

1. Something unpleasant or difficult that continues with the same force and never b

1.adjectiveB2
Definition

Something unpleasant or difficult that continues with the same force and never becomes easier to deal with.

Example

Asher could barely sleep because of the relentless heat during the summer nights.

relentless + noun (heat, pressure, noise)

The relentless rain caused floods that damaged many homes across the village.

Common collocations
  • relentless heat
  • relentless pressure
  • relentless rain
  • relentless noise
  • relentless criticism
Synonyms
  • unceasing

    more formal and literary; used for things that never stop

  • persistent

    softer tone; can be neutral or negative depending on context

  • unrelenting

    nearly identical meaning; slightly more formal

Antonyms
  • temporary

    lasting only for a short time

  • brief

    short in duration; opposite of continuing for a long time

Usage Note

Commonly used with nouns describing unpleasant forces or conditions such as heat, pressure, noise, criticism, or pain.

Common Mistakes

The cold was relentless, but I enjoyed it very much.
The cold was relentless, and I could not stand it any longer.
'relentless' describes something severe and unpleasant, not something enjoyable.

2. A person who refuses to change their goal or give up, even when facing strong op

2.adjectiveB2
Definition

A person who refuses to change their goal or give up, even when facing strong opposition or difficulty.

Example

Heloísa was relentless in her efforts to improve the local library for the children.

was relentless in + noun / gerund

Gita's relentless drive to learn new languages helped her become a successful translator.

possessive + relentless + noun (drive, pursuit, focus)

Common collocations
  • relentless in
  • relentless pursuit
  • relentless drive
  • relentless focus
  • relentless efforts
Synonyms
  • determined

    more common and neutral; can be positive or negative depending on context

  • persistent

    softer; suggests continuing effort without the 'unyielding' implication

  • unyielding

    emphasises the refusal to change one's position or demands

Antonyms

Usage Note

Often followed by 'in + noun/gerund' (e.g. relentless in her work, relentless in their efforts). Can describe either an admirable quality (determination) or a negative trait (refusing to compromise).

Common Mistakes

She is relentless to win the competition.
She is relentless in her pursuit of victory in the competition.
'relentless' is not followed by an infinitive; use 'relentless in + noun/gerund' instead.

Word family

  • relent
    verbC1
  • relentlessly
    adverbB2
  • relentlessness
    nounC1
  • unrelenting
    adjectiveC1

Synonym discussion

Sense: adjective/2

All four words describe someone who keeps going, but they differ in tone and focus. 'Determined' is the most neutral and common — it simply means having a strong will to succeed, without the negative edge of the others. 'Persistent' suggests continuing effort over time, often despite obstacles, and can be either positive ('persistent student') or mildly negative ('persistent sales calls'). 'Relentless' is stronger and more intense: it implies an unyielding refusal to stop, which can be admirable ('relentless pursuit of justice') or intimidating ('relentless questioning'). 'Unyielding' focuses on the refusal to change one's position or demands, carrying the clearest negative tone. For example, a determined athlete trains hard; a relentless one trains at a punishing pace and never rests.

relentless ↗determined ↗persistent ↗unyielding ↗

Common collocations

Nouns

Adverbs

  • relentlessly

Phrases

  • in the face of relentless opposition
  • under relentless attack

Etymology

LatinFrenchEnglish

Formed by adding the suffix '-less' (meaning 'without') to the verb 'relent', which came from Latin 'lentus' meaning 'bendable, flexible, slow'. So 'relentless' literally means 'unable to be bent or softened' — someone or something that will not give way.