remitlessadj.
/rᵻˈmɪtlᵻs/, U.S. /rəˈmɪtlᵻs/, /riˈmɪtlᵻs/ rare.
Without remission; unremitting, relentless; unpardoned.
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
1818 E. Sampson Brief Remarker on Ways of Man xix. 74 Who, in spite of feebleness of frame, foregoes sleep, and patiently endures a course of remitless watchings of incredible length?
a1907 F. Thompson To Stars in Wks. (1913) I. 198 Meek guides and daughters to the blinded heaven In Œdipean, remitless wandering driven.
1990 S. Morgan Homeboy xxxvii. 224 Benny was pulling hard time. Joe only hoped the remitless heat wasn't driving him stir crazy.
This entry has been updated (OED Third Edition, December 2009; most recently modified version published online March 2022).
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adj.1818