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Apps

Mozilla Firefox

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Apps

iPhone + iPad

Help Center, release notes, Download

Mac + Safari

Help Center, release notes, Download

Google Chrome

Help Center, Download

Mozilla Firefox

Help Center, Download

Opera

Help Center, Download

Microsoft Edge

Help Center, Download

Support

Download Help Center Supported languages Request a refund Restore password Restore serial codes Privacy policy

STAY IN TOUCH

Contact Twitter Blog

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Website translator Online translator Verb conjugator Der Die Das lookup Usage examples Words Definition Idioms

Definition of "いっせん" in Japanese

名・ス自

一回の戦闘。ひといくさ。
- 「―を交える」