[sur.rep.ti.tious] adj [ME, fr. L surrepticius, fr. surreptus, pp. of surripere to snatch secretly, fr. sub- + rapere to seize--more at rapid] (15c) 1: done, made, or acquired by stealth: clandestine
2: acting or doing something clandestinely: stealthy syn see secret -- sur.rep.ti.tious.ly adv