んだもん

Explanation of んだもん: The expression んだもん is a casual way to provide reasoning or justification for something in conversation. It is commonly used in spoken Japanese, particularly among friends or in informal settings.

This expression can imply a sense of defensiveness, as it often comes up when someone is explaining themselves or offering an excuse.

• Usage: Typically used at the end of a sentence to emphasize the reason behind an action or feeling.
• Nuance: It reflects a tone that is somewhat conversational and personal, which makes it less suitable for formal writing.