文脈 ぶんみゃく じょう かならず字句 じくじゃないです
bun myakujōno kanarazu sujikujanaidesu

Noun
Desu Copula
Negation Auxiliary

The polite negative form of 文脈上の必す字句

1. It's not necessarily a fixed phrase in context.; It's not strictly necessary in context.

Negative
Polite
Casual Register
Computing