insidiouslyadv.
/ɪnˈsɪdɪəsli/, U.S. /ᵻnˈsɪdiəsli/ In an insidious manner; by secret plotting or artifice; in a subtle or underhand way; slyly, craftily, treacherously, deceitfully.
ΘΚΠ
the world > action or operation > ability > skill or skilfulness > cunning > [adverb]
foxlyc1175
craftilyc1225
craftlyc1225
slylyc1275
fellyc1300
quaintc1300
quaintlyc1325
sleightlyc1330
subtly1340
sly1370
espyinglya1382
wisely1390
wililya1400
wilyc1400
subtilelyc1405
ginnouslya1425
semylyc1440
serpentlya1450
small?c1450
cautelously1477
politicly1477
sleightfullyc1480
artificiously1536
insidiously1545
sleightily1549
artificially1566
cunningly1603
versutely1616
artfully1631
subdolously1638
serpentinely1656
slimlya1680
pawkily1714
politically1764
trickfullyc1790
trickishly1824
leerily1859
dodgily1868
trickily1895
foxily1933
the mind > mental capacity > knowledge > secrecy, concealment > stealthy action, stealth > [adverb]
softlyc1225
by stalea1240
privilya1250
slylyc1275
thieflyc1290
stealingly13..
by stealth1390
stalworthlya1400
theftfullyc1400
theftlyc1400
theftuouslyc1400
under veilc1425
thievishly?c1450
by theft1488
quietly1488
furtively1490
by surreption1526
hugger-muggera1529
in hugger-mugger1529
underhand1538
insidiously1545
creepingly1548
surreptiously1573
underboard1582
filchingly1583
sneakingly1598
underwater1600
slipperily1603
thief-likea1625
clandestinely1632
surreptitiously1643
thievously1658
clancularly1699
stownlins1786
stealthily1806
underhandedly1806
stolen-wise1813
on (upon, under, or by) the sly1818
round-the-corner1820
underhanded1823
stealthfully1828
slinkingly1830
slippingly1830
on the sneak?1863
sneakishly1867
behind backs1874
stalkingly1891
on the side1893
under the counter1926
underground1935
under the table1938
down and dirty1959
sneakily1966
the mind > mental capacity > knowledge > conformity with what is known, truth > deceit, deception, trickery > snare, trap, entanglement > [adverb]
insidiously1545
on (formerly upon) the prowl1803
entrappinglya1827
ensnaringly1853
1545 G. Joye Expos. Daniel (vi.) f. 86 These men insidiously obseruing daniel, espyed him praying and makinge supplicacion to his god.
a1626 F. Bacon Considerations War with Spain in Wks. (1874) XIV. 472 The castle of Cadmus was taken by Phebidas..insidiously and in violation of league.
1781 S. Johnson Pope in Pref. Wks. Eng. Poets VII. 99 Those who officiously, or insiduously, quicken his attention to offences.
1844 W. H. Mill Serm. Tempt. Christ iii. 62 The reptile, insidiously lying in wait in the dust.
This entry has not yet been fully updated (first published 1900; most recently modified version published online March 2022).
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adv.1545