undetectable

• Qui ne peut pas être détecté ou remarqué, que ce soit physiquement, techniquement ou de façon imperceptible.

Describes something that cannot be discovered or noticed.

1. Not easily seenB2formal

   Difficult or impossible to notice with the eyes.

   Indétectable (à l'œil)

   • The stain on the carpet was nearly undetectable.
   • The camouflage made the soldier undetectable in the forest.
   • The tiny crack in the vase was undetectable from a distance.

   Synonymesconcealedhiddenimperceptibleindiscernibleinvisibleobscureunnoticeable

   Antonymesapparentconspicuousnoticeableobviousvisible

2. Barely able to be perceivedB2formal

   So subtle or faint that it is almost impossible to sense or notice.

   Imperceptible

   • The change in temperature was undetectable to the human touch.
   • His nervousness was undetectable in his calm voice.
   • The difference between the two colors is undetectable to the naked eye.

   Synonymesfaintimperceptibleindistinctobscureslightsubtleunnoticeable

   Antonymesapparentcleardistinctevidentnoticeableobviousperceptibletangible