They were stowaways, living undetected in some unexplored section of the ark.

She states that the legend of the Loch Ness Monster often provided her family the cover they needed to live among the humans undetected.

Did any of you know that until very recently, a tribe of killer monkeys lived undetected in Greenwich Village?

After several months living undetected on Long Island and in New Jersey, the McAllisters requested political asylum, but, as usual, their timing was off.

Settling in the city of Hagen, he lived in Germany undetected until 1995.

In their daytime human forms, rokurokubi often live undetected and may even take mortal spouses.

Many said it was inconceivable that his organisation had not known the al-Qaeda head was living undetected in Pakistan.

In either case, the player characters were centuries-old, and they managed to live undetected among humans throughout history.

But she returns, and with Sisif's eyesight almost completely gone, manages to live undetected in his shack for a time.

They are thus unintentionally, but inevitably, spreading the disease for the seven to eight years in which it lives undetected in their bodies.