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surreptitiously

[ sur-uhp-tish-uhs-lee ]
/ ˌsɜr əpˈtɪʃ əs li /
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adverb
in a secret or unauthorized way; stealthily: After it surreptitiously installs itself on a user's phone, the spyware program can steal credit card numbers, passwords, and other personal information.
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Origin of surreptitiously

First recorded in 1580–90; surreptitious + -ly
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use surreptitiously in a sentence

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