echolessadj.
/ˈɛkəʊlɪs/ a. That has no echo; chiefly poetic or rhetorical in the sense ‘silent, noiseless’.
ΘΚΠ
the world > physical sensation > hearing and noise > degree, kind, or quality of sound > non-resonance > [adjective] > without echo
echoless1798
unechoing1817
anechoic1946
1798 Monthly Rev. 26 503 An aerial telegraph..by means of which the voyagers [in balloons] can talk with each other in the echoless space.
1816 Ld. Byron Prometh. 14 The suffocating sense of woe, Which speaks but in its loneliness..nor will sigh Until its voice is echoless.
1825 Blackwood's Mag. 18 440 No unfit haunting place for things of echoless footstep.
1868 A. I. Menken Infelicia 3 That far off, echoless promise.
b. figurative. That gives no echo; unresponsive.
ΘΚΠ
the mind > emotion > absence of emotion > [adjective] > emotionally unaffected
dead1340
unsmittenc1400
unmovedc1480
unkindleda1525
senseless1560
lumpish1585
unfired1590
unaffectedc1595
incapable1601
unsensible1611
insensible1615
untouched1616
impervious1618
unanswering1632
untransported1641
beauty-proof1676
insensate1726
unsusceptible1734
uninfluenced1735
unimbued1813
unsmote1814
unsusceptive1825
unalive1828
echoless1869
non-conducting1871
unsusceptible1872
irresponsive1886
affectless1912
1869 R. Browning Ring & Bk. IV. x. 25 Father and mother stunned and echoless To the blow.
This entry has not yet been fully updated (first published 1891; most recently modified version published online March 2019).
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adj.1798