noun which may take the genitive case particle 'no', na-adjective, noun
average; ordinary; run-of-the-mill
Describes ability, appearance, or quality as being about the same as ten random people—neither outstanding nor poor. Often used modestly or to downplay something.
彼の英語力は十人並みだ。
His English ability is about average.
She has ordinary looks, but her personality is really nice.