untraceably

He made his plans as meticulously as in the old days with his father, untraceably buying a two-horse trailer and a car to pull it; and hiding them away in a city lock-up garage.

The Elvis Latte Allie Dresser 2010

Ask any doctor how to poison someone untraceably, and he can tell you.

Bruce Schneier Blazes Through Your Questions - Freakonomics Blog - NYTimes.com 2007

Ask any doctor how to poison someone untraceably, and he can tell you.

Bruce Schneier Blazes Through Your Questions - Freakonomics Blog - NYTimes.com 2007

Later, it is true, the Brazilians launched a flying-machine of a type and scale that was capable of dealing with an airship, but they built only three or four, they operated only in South America, and they vanished from history untraceably in the time when world-bankruptcy put a stop to all further engineering production on any considerable scale.

The War in the Air Herbert George 2006

Emmett was swinging an aluminum bat; it whistled almost untraceably through the air.

Twilight Meyer, Stephenie 2005

And ways on-planet to untraceably access information once one had those credits.

Beast Master's Circus Norton, Andre 2004

Zarken might have cut himself off from civilization, but he had a pair of drone ships that shuttled to and from the Cluster for shipments of the highest-grade technologies money could buy, purchased directly and untraceably from old-system suppliers.

Analog Science Fiction and Fact 2004

He made his plans as meticulously as in the old days with his father, untraceably buying a two-horse trailer and a car to pull it; and hiding them away in a city lock-up garage.

Field Of Thirteen Francis, Dick 1998

I've fixed it so that it happens completely automatically and untraceably.

Mostly Harmless Adams, Douglas, 1952- 1992

They wouldn't need but a few minutes to carry out their mission, then they'd be untraceably gone.

Time Patrolman Anderson, Poul, 1926-2001 1983