How to say "Reason" in Russian?

[Prichina]

"Reason" is Причина in Russian.

Причина means "Reason" in English.

Word #328 of 6,000 by frequency in Russian.

Какая причина твоего плохого настроения?

What's the reason for your bad mood?

• Решение, Solution
• Заниматься, To practice, to engage in
• Единственный, The only
• Бояться, To be afraid
• Добрый, Kind
• Образ, Image/Form
• Век, Century