furtief (bn):
furtif(en) of a thing: exhibiting guilty or evasive secrecy.
(en) of a person or animal: sly, stealthy., subreptice(en) of a thing: exhibiting guilty or evasive secrecy.
(en) of a person or animal: sly, stealthy.
Via: Dbnary en WikiWoordenboeken
Via: Memodata.com