This is the 3782nd most frequent Japanese word.
ないし
"ないし" means "or" or "or else," indicating alternatives or a range.
In this sentence, 'ないし' is used to specify an alternative or a conditional choice, akin to 'or' or 'and/or'.
彼は弁護士の資格があります、ないし行政書士としても活動しています。
He has a qualification as a lawyer, or he also works as an administrative scrivener.
Here, 'ないし' indicates a choice or range of possibilities, demonstrating flexibility or alternatives depending on the situation.
締め切りは明日までないしもう少し延ばしてもいいです。
The deadline is until tomorrow, or it can be extended a little further.
In this example, 'ないし' connects two entities, providing an option between them and is used to offer a clarification or extension of options.