On the sly and Unobserved

On the sly

On the sly adverb - In a furtive manner.

Unobserved and on the sly are semantically related in in hidden manner topic. In some cases you can use "Unobserved" instead an adverb phrase "On the sly".

Unobserved

Unobserved adjective - Not observed.

On the sly and unobserved are semantically related in in hidden manner topic. Sometimes you can use "On the sly" instead an adverb "Unobserved".
Cite this Source
Unobserved and On the sly. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/on_the_sly/unobserved
On the sly & Unobserved. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/on_the_sly/unobserved>.
Unobserved or On the sly. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/on_the_sly/unobserved.