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to press against each other; to huddle together
子供たちは身を寄せ合った。
The children huddled together.
乗客たちは車内で身を寄せ合っている。
Passengers are pressing close to each other inside the train.
寒い夜空の下、家族が身を寄せ合う。
Under the cold night sky, the family huddles together.