Definify.com

Webster 1913 Edition

adv.

Stealthily by theft.

Lover.

furtively ‎(comparative more furtively, superlative most furtively)

in a furtive manner

Kurdish: bi dizîkî (ku), bi nehînî (ku), bi razberî (ku)
Polish: ukradkiem (pl), chyłkiem, potajemnie (pl)
Russian: скры́тно (ru) ‎(skrýtno), укра́дкой (ru) ‎(ukrádkoj), тайко́м (ru) ‎(tajkóm), та́йно (ru) ‎(tájno)