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To not express gratitude or say thank you.
彼女は礼を言わないでプレゼントを受け取った。
She accepted the gift without saying thank you.
礼を言わないと、無礼に見えるよ。
If you don't say thank you, it will seem rude.
This phrase is often used to criticize someone for not showing gratitude.
In Japanese culture, expressing gratitude is highly valued, and omitting it can be seen as impolite.
Always acknowledge kindness or favors with a proper expression of thanks in Japanese society.
Combination of 礼 (rei, gratitude/thanks) and 言わない (iwanai, do not say).
This phrase is commonly used to point out a lack of politeness or gratitude in social interactions.