The Collaborative International Dictionary
Subreptitious
Subreptitious \Sub`rep*ti"tious\, a. [L. subreptitius. See Surreptitious.] Surreptitious. [Obs.] -- Sub`rep*ti"tious*ly, adv. [Obs.]
Wiktionary
subreptitious
a. (obsolete form of surreptitious English)