relentlessly

English

WOTD – 2 July 2026

Etymology

Etymology tree

English relent

Proto-Indo-European *lewh₁-

Proto-Indo-European *lewHs-der.

Proto-Germanic *leusaną

Proto-Germanic *lausaz

Proto-Germanic *-lausaz

Proto-West Germanic *-laus

Old English -lēas

Middle English -les

English -less

English relentless

Proto-Indo-European *leyg-der.

Proto-Germanic *līkąder.

Proto-Germanic *-līkaz

Proto-Germanic *-ê

Proto-Germanic *-līkê

Proto-West Germanic *-līkē

Old English -līċe

Middle English -ly

English -ly

English relentlessly

From relentless + -ly (suffix forming abverbs from adjectives and nouns). Relentless is derived from relent (“(noun) act of relenting or giving way, yielding; (verb) to become less cruel or harsh; to become less intense”) + -less (suffix meaning ‘lacking, without’); and relent from Middle English relenten (“to melt; to soften; to dissolve in water; of weather: to be cool and moist”), from Anglo-Norman relenter, relentir (“to melt; to shrivel; to give up; to slacken”), and also influenced by Middle French ralenter, ralentir (“to abate; to slow down”) (modern French ralentir), from re- (prefix meaning ‘again’ having intensifying effect) + alenter, alentir (“to slow down”) (from Old French alentir, from a- (prefix denoting entering a state or progressing towards a goal) + lent (“slow”) (from Latin lentus (“slow, sluggish”), possibly ultimately from Proto-Indo-European *lentos (“pliant; soft; smooth”)) + -ir (suffix forming infinitives of verbs)).

Pronunciation

• (Received Pronunciation) IPA^(key): /ɹɪˈlɛntləsli/

• Audio (Southern England):

  (file)

• (General American, Canada) IPA^(key): /ɹəˈlɛn(t)ləsli/, /ɹi-/

• Audio (North Carolina); /ɹiˈlɛntləsli/:

  (file)

• (Australia) IPA^(key): /ɹɪˈlentləsli/
• (New Zealand) IPA^(key): /ɹəˈlentləsli/
• Hyphenation: re‧lent‧less‧ly

Adverb

relentlessly (comparative more relentlessly, superlative most relentlessly)

1. In a relentless manner.

   Antonym: unrelentlessly

   1. In a manner unrelenting or unyielding in severity; unrelentingly.

      Near-synonyms: harshly, pitilessly, ruthlessly

      • 1815 September 10 – December 14, Percy Bysshe Shelley, “Alastor; or, The Spirit of Solitude”, in Alastor; or, The Spirit of Solitude: And Other Poems, London: […] Baldwin, Cradock, and Joy, […]; and Carpenter and Son, […] [b]y S[amuel] Hamilton, […], published 1816, →OCLC, page 21:

        For sleep, he knew, kept most relentlessly / Its precious charge, and silent death exposed, / Faithless perhaps as sleep, a shadowy lure, / With doubtful smile mocking its own strange charms.

      • 2025 October 22, PA Media, quoting Jim O’Callaghan, “Second night of unrest in Dublin as protesters target asylum hotel”, in Katharine Viner, editor, The Guardian‎^[1], London: Guardian News & Media, →ISSN, →OCLC, archived from the original on 6 December 2025:

        He said gardaí had responded professionally to "thuggish violence" in the area and those arrested would be "charged, named and dealt with relentlessly" by the criminal justice system.

   2. In a steady and persistent manner; unceasingly.

      Synonyms: unremittingly; see also Thesaurus:continuously

      • 1763? April 2, [Hugh Kelly], “Saturday, April 2 [1763?]”, in The Babler. Containing a Careful Selection from those Entertaining and Interesting Essays, […], volume I, number LXI, London: […] J[ohn] Newbery, […]; L. Hawes, W. Clarke, and R. Collins, […]; and J[ames] Harrison, […], published 1767, →OCLC, page 265:

        My friend is one of thoſe people, vvho having formerly cut a very gay figure in the vvorld, is ſtill ambitious of ſpreading the May-bloom of tvventy-five upon the vvinter of threeſcore; and deſirous of diſplaying in the fulneſs of his ſpirits, that ſprightlineſs and vivacity vvhich time has relentleſsly taken from his perſon: […]

      • 2022, Gary A. Garfield, “Vision: Lesson #2”, in Driving Results: Six Lessons Learned from Transforming an Iconic Company, Hoboken, N.J: John Wiley & Sons, →ISBN, part II (The Six Lessons for Change), page 105:

        The vision must be shared. The leadership team must believe in it and pursue it relentlessly, along with the leader herself.

Derived terms

• unrelentlessly

Related terms

• relent
• relentless

Translations

in a relentless manner

• Chinese:

  Cantonese: 硬係 / 硬系 (ngaang^6-2 hai⁶, ngaang⁶ hai⁶)

• Finnish: hellittämättömästi, heltymättömästi, leppymättömästi, periksiantamattomasti (fi), säälimättömästi (fi), sinnikkäästi (fi)
• French: inexorablement (fr), sans relâche (fr)
• Georgian: შეუბრალებლად (šeubraleblad)
• German: unbarmherzig (de), unerbittlich (de)
• Italian: senza esclusione di colpi (literally “without exclusion of hits”)
• Japanese: びしびし, ビシビシ (bishibishi)
• Latin: irremissē (Late Latin), irremissibiliter (Late Latin)
• Macedonian: неподатливо (nepodatlivo), непопустливо (nepopustlivo)
• Pannonian Rusyn: нємилосердно (njemiloserdno)
• Polish: bezustannie (pl), nieustannie (pl), nieustająco (pl), zacięcie
• Russian: неотсту́пно (ru) (neotstúpno), не поклада́я ру́к (ru) (ne pokladája rúk), неукло́нно (ru) (neuklónno), неуста́нно (ru) (neustánno)
• Serbo-Croatian:

  Cyrillic: не̏милосрдно

  Latin: nȅmilosrdno (sh)

• Spanish: despiadadamente (es), inexorablemente (es), implacablemente (es), inclementemente
• Swedish: obönhörligen (sv), obönhörligt (sv)
• Ukrainian: невпи́нно (nevpýnno)
• Vietnamese: rầm rầm (vi)