unperceivedlyadv.
/(ˌ)ʌnpəˈsiːvᵻdli/, U.S. /ˌənpərˈsivᵻdli/ Now rare.
Without being noticed or observed.
ΘΚΠ
the mind > mental capacity > knowledge > hiding, concealing from view > [adverb] > without being observed
at unawares1596
unperceivedly1616
occultly1641
unadvertedly1660
undiscernedly1660
unawares1670
1616 P. Hay Vision Balaams Asse v. 110 To temper Poyson so, that when it was most deadly, it wrought most vnperceiuedly.
1663 R. Boyle Some Considerations Usefulnesse Exper. Nat. Philos. ii. App. 352 Sometimes in filtration, some of the thinner parts of the oyl have unperceivedly passed through the paper.
1713 W. Derham Physico-theol. iii. iv. 78 Descending (though unperceivedly) gently down..to the Sea.
1786 Public Advertiser 17 Oct. The till, containing three or four pounds in silver and halfpence, was unperceivedly carried away.
1859 Bombay Times 14 Sept. 589/2 The venemous creature unperceivedly followed the tailor to his house.
1897 Christian Work 16 Sept. 453/1 He quietly and unperceivedly deposited a copy each of some half a dozen or so of the leading religious weeklies.
1955 T. R. V. Murti Central Philos. Buddhism iii. 71 It changes every moment, uniformly, unperceivedly, relentlessly.
This entry has been updated (OED Third Edition, December 2014; most recently modified version published online December 2021).
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adv.1616