B1noun formal 3K

Oath

UK //əʊθ// US //oʊθ// Pronunciation

Definition

A formal promise, often invoking a divine witness, to affirm the truth of one's statements.

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In simple words: A promise to tell the truth or do something important.

Examples

• He took an oath to uphold the law.
• The president must take an oath before assuming office.
• In court, witnesses must swear an oath to tell the truth.
• She made an oath of loyalty to her country.
• Breaking an oath can have serious consequences.

Usage notes

Used in legal and ceremonial contexts. It may not be appropriate in casual conversation.

Listen to usage notes

Grammar pattern

oath + (of) + object

Memory hint

Think of 'oath' like 'both' – you promise to do two important things.

Collocations

• take an oath
• sworn oath
• oath of office
• oath of allegiance

Synonyms

• promise
• pledge
• vow
• swear
• commitment

Antonyms

• lie
• dishonesty

Common mistakes

• Confusing 'oath' with 'oaths' as the plural form.
• Using it in informal settings when it's typically formal.