English adjective: undetectable | |||
1. | undetectable not easily seen | ||
Similar | invisible, unseeable | ||
Antonyms | seeable, visible | ||
2. | undetectable barely able to be perceived | ||
Samples | The transition was almost indiscernible. An almost insensible change. | ||
Synonyms | indiscernible, insensible | ||
Similar | imperceptible, unperceivable | ||
Antonyms | perceptible | ||