indefeasible etymology

Etymology

• Indo-European: nd- ("not") + fei- ("faith")
• Latin: indefessus ("unwearied, untiring")
• French: indéfectible

Meaning

• That cannot be undone or broken
• Irrevocable
• Unassailable

Origin

The word "indefeasible" first appeared in the 14th century Middle English from the Old French word indéfectible. The Old French word itself is derived from the Latin verb indefessus, which means "unwearied" or "untiring".

The root of indefessus is the Indo-European root nd-, which means "not", and fei- which means "faith". It is related to the Latin word fides, meaning "faith".

The original meaning of "indefeasible" was "unwearied", but it has since come to mean "that cannot be undone or broken". This is because something that is not weariable is also not able to be defeated or undone.

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