They refused until they had “achieved their surreptitious climax.”
Last month I turned and faced their surreptitious security: “Catch any thieves today?”
But by 1953, with McCarthyism and the second Red Scare in full swing, the FBI moved from surreptitious research to direct contact.
mid-15c., from Latin surrepticius "stolen, furtive, clandestine," from surreptus, past participle of surripere "seize secretly," from sub "from under" (hence, "secretly") + rapere "to snatch" (see rapid). Related: Surreptitiously.