Synonym Boundary: "ありがとう", "お疲れ様", "ありがとうございます", "感謝する"

When expressing "thank" in Japanese, you must carefully distinguish between "ありがとう", "お疲れ様", "ありがとうございます", "感謝する" based on context.

• ありがとう (ありがとう (arigatou) - Level: N5): Maps to "Thank you" and is used when An informal way to express gratitude. The polite form is ありがとうございます.
• お疲れ様 (おつかれさま (otsukaresama) - Level: N5): Maps to "Thank you for your hard work; You must be tired (greeting)" and is used when A common greeting used to acknowledge someone's effort or hard work, often said at the end of the day, after a meeting, or when someone has completed a task. Not necessarily implying the person is *actually* tired, but showing appreciation..
• ありがとうございます (ありがとうございます (arigatou gozaimasu) - Level: N5): Maps to "Thank you (polite)" and is used when Polite way to express gratitude. Often shortened to ありがとう.
• 感謝する (かんしゃする (kansha suru) - Level: N4): Maps to "to thank, to appreciate, to be grateful" and is used when A more formal way to express gratitude compared to ありがとう. Often used in written form, formal speeches, or when expressing deep appreciation..

Mixing these up can easily lead to unnatural translations. Refer to the bilingual context cards below to master the boundaries!