Where does “surreptitiously” come from?

Surreptitiously comes from Middle English -ly added to Latin surrepo, derived from Latin sub- and Latin sub, ultimately traced to Proto-Indo-European līg- and Proto-Indo-European ḱóm.

surreptitiously (English): In a surreptitious manner; stealthily, furtively,...

Definitions

In a surreptitious manner; stealthily, furtively,...

Ancestry of “surreptitiously”, step by step

Step	Language	Word	Meaning
1	English	surreptitious	Stealthy, furtive, well hidden, covert
2	Latin	surrēptīcius	—
3	Latin	surreptus	snatched away; pilfered
4	Latin	surripio	I snatch away; I steal or pilfer
5	Latin	sub-	sub-
6	Proto-Indo-European	upó	under, below
7	Proto-Indo-European	h₃ewp-	—

Every word from Proto-Indo-European h₃ewp- →

surreptitiously — Etymology, Origin & Word History | Etymology Explorer