Surreptitious

прилагательное 1) тайный; сделанный тайком Например: Glancing at the clock with a surreptitious eye. — Взглянув украдкой на часы. Синоним(ы): stealthy 2) неподлинный (о тексте); пиратский, изданный без разрешения

Большой англо-русский словарь

Surreptitious

adjective Etymology: Middle English, from Latin surrepticius, from surreptus, past participle of surripere to snatch secretly, from sub- + rapere to seize — more at rapid 1. done, made, or acquired by stealth; clandestine 2. acting or doing something clandestinely; stealthy Example: a surreptitious glance Synonyms: see secretsurreptitiously adverb

Merriam-Webster's Collegiate Dictionary