Swear blind

verb

To promise or insist very strongly that something is true, even though it might not seem probable.

She would swear blind that she had never seen him before.
Visual representation of "swear blind" - To promise or insist very strongly that something is true, even though it might not seem probable.

Often appears as...

  • swear blind that
  • swear blind about

Usage tips

Informal

Idiomatic

verb

To promise or insist very strongly that something is true, even though it might not seem probable.

She would swear blind that she had never seen him before.
Visual representation of "swear blind" - To promise or insist very strongly that something is true, even though it might not seem probable.

Often appears as...

  • swear blind that
  • swear blind about

Usage tips

Informal

Idiomatic

Definition 1 of 1
Visual representation of "swear blind"
LampPro Tip 1/3

Strong Assurance

Used when someone guarantees truth with high conviction, despite doubts from others.

Illustration for Strong Assurance
He'll swear blind the deal is safe, but I'd check the details first.
LampPro Tip 2/3

Emotional Emphasis

Emphasizes how strongly a person feels about what they're saying.

Illustration for Emotional Emphasis
She swore blind that it was the best decision for everyone involved.
LampPro Tip 3/3

Informal Speech

Primarily used in casual conversation, not in formal writing or speech.

Illustration for Informal Speech
In court, avoid phrases like 'swear blind'; use 'I assure you' instead.
Visual representation of the word "Swear blind"

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