Definition

Something that cannot be canceled, changed, or made invalid.

Example

The contract provided an indefeasible right to the property.

Conversation

Did you know that some rights are considered indefeasible once granted?

Really? I thought all rights could be changed or taken away.

Nope! Some are so fundamental that they are indefeasible by law.

That makes sense; it's important to protect those rights.

Synonyms & Antonyms

Root Explanation

Indefeasible is formed from "in-" (meaning not) and "defeasibilis" (from Latin "defeasere", meaning to annul or make void). The word means something that cannot be annulled or made void, thus indicating permanence or stability.

Memory Tip

Think of 'not' ('in-') being able to 'make void' ('defeasere') — that's why indefeasible means something that cannot be undone.

Visually Confused Words