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老成 ろうせいらなければならない
rōseira nakereba naranai

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Ichidan Verb
, 
i-Adjective

Expresses obligation ("must do") of 老成る

1. Must mature.; Must grow up.; Must become responsible.

Obligation

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老成らなければならない

老成らなければならない【ろうせいらなければならない】 Activity

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