The term "green flag" comes from the color green being associated with safety and permission, like in traffic signals where green means "go." In modern relationship slang, this idea is used to describe positive signs. Today, a "green flag" refers to a behavior, trait, or action that shows someone is a good, healthy, or compatible partner. It highlights qualities that make a relationship feel safe and promising.

英語での「green flag」の定義と意味

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