Englishfor English speakers
undetected
—
adjective
not perceived or discerned
they feared some undetected trace of poison
she looked around to be sure her faux pas was undetected
error
Noun
—
An error is something which is accidentally not correct.
The bank made an error and gave me too much money.
—
An error can refer to a computer error.
I keep getting errors on my computer program.