cross one's heart
The phrase 'cross one's heart' is often used to emphasize honesty or sincerity in promises, with roots in religious practices.
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Definition
B2Everyday Conversation
(informal)To make a sincere promise or assurance, often with a gesture of crossing one's heart.
Example
- I cross my heart, I won't tell anyone your secret.
- Cross my heart, I'll be there on time.
Similar
Terms that have similar or relatively close meanings to "cross one's heart":
cross one's fingerscrossed fingerspinky swearpinky promiseon one's honorfingers crossedswear downswear byheart to heartwith all one's heart