unrelentedadj.
/(ˌ)ʌnrᵻˈlɛntᵻd/, U.S. /ˌənrəˈlɛn(t)əd/ Unmitigated, unmoderated, unabated; unrelenting.
ΘΚΠ
the world > action or operation > continuing > [adjective] > continuous or without stop or pause (of action) > unremitting
dreichc1400
unrespited1593
unslacked1593
unremitteda1630
unrelented1651
unremitting1668
unflagging1715
unrelaxing1715
unbating1744
unslackening1768
unabatinga1774
unremittent1776
unreceding1810
irremissive1817
remitless1818
unrelaxed1825
unslackened1870
bateless1886
the mind > will > decision > perseverance or persistence > [adjective] > of actions or qualities
inextinguible1412
inextinguishable1509
assiduatea1513
assiduousa1552
unwearied1561
unweariable1571
assidual1622
inextinct1623
unrelented1651
inextinguished1746
unrelaxed1825
1651 J. Saint-Amard tr. F. Micanzio Life Father Paul sig. N7 This unrelented way of reading and writing..is a kinde of intemperance.
1714 N. N. Will-with-a-wisp 14 Our Will-with-a-Wisp sublimes himself, Meteor-like, to a more splendid Fault, either by persisting in his unrepented Error, or glorying in his unrelented Accusation.
1791 Scots Mag. Aug. 411/2 Their unrelented care and pains for establishing peace.
1838 Southern Bot. Jrnl. 3 Mar. 7/2 Our friends in New-York are likely to be persecuted with an unrelented fury.
1888 O. Crane Minto 29 I will..kneel Before yon foeman, will implore away His unrelented cruelty.
1917 Burlington (Iowa) Hawk-eye 11 Dec. 1/5 In mountain warfare a victory will not produce the desired effect unless it is immediately exploited with unrelented action.
1998 Econ. & Polit. Weekly 30 May 1305/2 There was an unrelented pressure on Pakistan from within to go nuclear.
This entry has been updated (OED Third Edition, December 2014; most recently modified version published online December 2021).
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adj.1651