untrackable

not-comparable

Not trackable; incapable of being tracked.

Japanese Meaning

追跡できない / 追跡不可能な

The black-market device made his location untrackable, forcing investigators to rely on old-fashioned detective work.

闇市場で手に入れた装置によって彼の居場所は追跡不可能になり、捜査官たちは昔ながらの捜査方法に頼らざるを得なかった。

Sense（1）

Not trackable; incapable of being tracked.

Untrackable debris is a hazard in space travel.