Concept:
The word \textit{surreptitious} means secretive or done in a stealthy manner. It comes from the Latin \textit{surrepticius}, meaning “stolen” or “secretly obtained.”
Explanation:
The correct spelling is surreptitious, which includes the consonant cluster \textit{ptit}. The incorrect options either omit letters, rearrange vowels, or simplify the structure incorrectly.