undetectable
adjective
- not able to be found
Wiktionary
adj
Etymology: Etymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Germanic *un- Proto-West Germanic *un- Old English un- Middle English un- English un- English detectable English undetectable From un- + detectable.
- Unable to be detected; not detectable.
“In these days of “rolled” gold, electro-plate, and undetectable pearls, it is curious that almost the only honest Ersatz material known to the goldsmith's art should be utterly forgotten.”
“A trial of scar may be justified in a woman with a previous cesarean section who is currently on HAART, has an undetectable virus and spontaneously goes into labor.”