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beloved; dear
「真」 has other readings with different meanings.
まな弟子として長年師匠に仕えてきた。
He served his master for many years as a beloved disciple.
まな娘を嫁に出すのは寂しいものだ。
Sending a beloved daughter off to marry is a lonely thing.
王はまな家臣に重要な任務を託した。
The king entrusted an important task to his dear retainer.