In petto
On the sly and in petto are semantically related. In some cases you can use "On the sly" instead an adverb phrase "In petto".
On the sly
On the sly adverb - In a furtive manner.
In petto and on the sly are semantically related. You can use "In petto" instead an adverb phrase "On the sly".
Mutual synonyms
Cite this Source
On the sly and In petto. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/in_petto/on_the_sly
In petto & On the sly. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/in_petto/on_the_sly>.
On the sly or In petto. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/in_petto/on_the_sly.