Definition

Something that cannot be found or noticed; it is not possible to detect it.

Example

The virus was undetectable in the early stages of infection.

Conversation

Have you heard about that new technology that is undetectable?

Yeah, it's amazing! I can't believe they managed to make it work like that.

I wonder how they can ensure it stays undetectable in the long run.

That's the tricky part, but I guess they're always improving their methods.

Synonyms & Antonyms

Root Explanation

Undetectable → It is formed from "un-" (meaning not) and "detect" (from Latin "detectus", meaning to uncover or discover) and "-able" (meaning capable of). The word "undetectable" means not capable of being uncovered or discovered.

Memory Tip

Think of 'not' ('un-') being able to 'uncover' ('detect') something — that's why undetectable means it cannot be discovered.

Visually Confused Words