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Etymology

oath

/əʊθ/

noun

Origin

Proto-Germanic

*aithaz — oath

Overview

Meaning Now

  • A solemn promise, often invoking a divine witness, regarding one's future action or behavior.
  • A profane use of the name of a deity or a swear word; a blasphemous expression.

Language path

Proto-Germanic → Old English → English

Earliest form

āþ

Earliest period

Old English

Journey

In early Germanic societies, an oath was not merely a statement of intent but a legally binding act often involving ritualistic components and divine invocation. The transition from 'solemn promise' to 'blasphemous profanity' reflects the linguistic tendency for words involving holy concepts to be repurposed for intense emotional expression.

Evolution

  1. Proto-Germanic

    *aithaz

    “solemn declaration”

  2. Old English

    āþ

    “oath”

    Masculine noun

  3. Middle English

    oth

    “solemn promise”

    Standardisation of spelling begins

  4. Modern English

    oath

    “solemn promise or profanity”

Connections

Word parts

oath

root

solemn promise

Related across languages

  • Old Norse

    eiðr

    oath

  • Old High German

    eid

    oath

  • Gothic

    aiþs

    oath

Related words

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External references use DefinedTerm semantics.