必要 ひつよう不可欠 ふかけつじゃないです
hitsuyōfukaketsujanaidesu

Desu Copula
na-Adjective
no-Adjective
Negation Auxiliary

The polite negative form of 必要不可欠

1. Not necessary; Not indispensable; Not essential

Negative
Polite
Casual Register