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to increase; to multiply
最近さいきん、仕事しごとが殖えふえて忙しいいそがしい。
Work has increased lately and I'm busy.
貯金ちょきんが少しすこしずつ殖えふえてきた。
My savings have been gradually increasing.
生徒せいとの数かずが殖えるふえるといいですね。
It'd be nice if the number of students increased.