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いる， 要る
1. to be needed, to be necessary, to be required, to be wanted, to need, to want
被需要，不可或缺，被要求，被想要，需要，想要
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世話を焼く， 世話をやく， せわをやく
1. to take care of someone, to look after someone, to help
2. to give help where it isn't wanted, to be officious, to bother, to meddle, to interfere
tbd
