“Cross my heart” is an informal promise that what you say is true. “Double-cross” means betray someone’s trust, while “get your wires crossed” means misunderstand one another, usually by accident. If people are “at cross purposes,” their goals or plans conflict. A “cross to bear” is a long-term problem or burden.
Cultural note: “Cross my heart and hope to die” is a childish-sounding oath; it does not make a claim more reliable. “Double-cross” accuses someone of betrayal, so use it only when you mean deliberate disloyalty. The article discusses religious symbols and histories; the lesson focuses on current idiom use and does not treat one tradition as universal.
Keep exploringCross-related phrases can mark a promise, a simple mix-up, competing goals, or a serious breach of trust.
Phrase guide · 5 expressions
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Original explanations and examples, created for learners. Save a card for later or hear the phrase spoken by your browser.
Promising honesty
Recognize an informal phrase that emphasizes a promise.
cross my heart
Meaning
An informal way to insist that what you are saying is true.
Tone & use
Often sounds childlike or playful. It is a promise, not evidence that the statement is true.
Example
““I really did send the form yesterday—cross my heart,” he said, then showed the confirmation email.”
NeutralInformal / childlike
Mistakes and mixed messages
Separate accidental misunderstanding from deliberate betrayal.
double-cross someone
Meaning
Betray someone who trusted you, often by acting against an agreement.
Tone & use
Strongly negative and implies deliberate betrayal; do not use for an ordinary mistake.
Example
“The partners accused the broker of double-crossing them after he secretly changed the terms.”
NegativeInformal / accusatory
get your wires crossed
Meaning
Misunderstand one another or mix up information, often unintentionally.
Tone & use
A gentle way to acknowledge a communication mix-up without assigning blame.
Example
“We got our wires crossed about the pickup time, so I waited at the wrong entrance.”
NeutralInformal / idiomatic
Conflicting goals and burdens
Describe misaligned plans or a persistent difficulty.
at cross purposes
Meaning
Working toward different or incompatible goals without realizing it or coordinating.
Tone & use
Often used in work or planning contexts; state the conflicting goals clearly.
Example
“The design and sales teams were at cross purposes because each had a different launch date.”
NegativeNeutral / idiomatic
a cross to bear
Meaning
A persistent difficulty or responsibility that causes trouble or worry.
Tone & use
Can sound dramatic and may have religious associations; use a plain phrase such as “ongoing burden” when appropriate.
Example
“Caring for the aging building became an ongoing burden for the volunteer group.”
NegativeInformal / idiomatic
Knowledge check
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Choose the expression that best fits each situation.
Try it · Choose the best expression
1 of 3
Two people accidentally misunderstand the meeting time. Which phrase can acknowledge the mix-up without accusing anyone?