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 | ||