Meaning of Undetectable
Unknown / অজানা / अज्ञात
to discover or catch (a person) in the performance of some act: to detect someone cheating.
to discover the existence of: to detect the odor of gas.
to find out the true character or activity of: to detect a spy.
Telecommunications. to rectify alternating signal currents in a radio receiver. to demodulate.
to perceive or notice: to detect a note of sarcasm