surreptitiousyoudaoicibaDictYouDict
surreptitious: [15] Latin surreptītius meant ‘taken away secretly’. It was formed from the past participle of surripere ‘take away secretly’, a compound verb formed from the prefix sub- ‘under’, hence ‘secretly’, and rapere ‘seize’ (source of English rape, rapture, etc). English acquired surreptitious direct from the Latin adjective.
=> rape, rapture, ravenous
surreptitious (adj.)youdaoicibaDictYouDict
mid-15c., from Latin surrepticius "stolen, furtive, clandestine," from surreptus, past participle of surripere "seize secretly, take away, steal, plagiarize," from assimilated form of sub "from under" (hence, "secretly;" see sub-) + rapere "to snatch" (see rapid). Related: Surreptitiously.