Definition

Something that cannot be delivered or sent to a destination.

Example

The package was marked as undeliverable due to an incorrect address.

Conversation

Did you get that package I sent you last week?

No, it was marked as undeliverable by the post office.

That's so strange, I double-checked the address before sending it.

Maybe it was just a temporary issue, I hope it gets sorted out soon.

Synonyms & Antonyms

Root Explanation

Undeliverable → It is formed from "un-" (meaning not), "deliver" (from Old French *delivrer*, meaning to free or set free), and "-able" (meaning capable of). The word means not capable of being delivered or unable to be sent to the intended recipient.

Memory Tip

Think of 'not' ('un-') being able to 'set free' ('deliver') something — that's why undeliverable means it cannot be sent.

Visually Confused Words