1.
whichever is fine; any one will do; it doesn't matter which
Used to express indifference about a choice, indicating that any option among a set is acceptable. Can convey flexibility, indecision, or lack of preference.
Composed of どれ (which one) + でも (even, any) + いい (good, fine). A fundamental conversational expression for expressing no preference. The tone can range from easygoing flexibility to slight frustration depending on context and intonation.
Related patterns
Usage
While this expression is useful and common, be aware that responding with どれでもいい when someone asks for your preference can sometimes sound dismissive or uninterested. In polite situations, it is better to name a preference or add a softener.