noun which may take the genitive case particle 'no', na-adjective, noun
Rare term, typically used in negative sentences to mean 'not ordinary' or 'not average'. Often appears as 並一通りではない or 並一通りでない.
彼の才能は並一通りではない。
His talent is not ordinary.
その光景は並一通りでない美しさだった。
The scene had a beauty that was not average.
並大抵 is a more common word meaning 'ordinary' or 'average', often used in negative sentences like 並大抵ではない. 並一通り is rarer and more literary.
Compound of 並 (なみ, 'average') and 一通り (ひととおり, 'generally'). The exact historical derivation is uncertain; it is a rare literary expression.