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もしかして， 若しかして
1. perhaps, possibly, maybe, by any chance, if I'm not mistaken
2. if, in case, in the event that
或许、可能、也许、碰巧、如果我没弄错的话；如果；假如；倘若
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兄弟， きょうだい， けいてい
1. siblings, brothers and sisters
2. brothers
3. siblings-in-law, brothers-in-law, sisters-in-law
4. mate, friend
手足，兄弟姐妹