無骨 ぶこつ一徹 いってつじゃないです
bukotsu ittetsujanaidesu

Noun
Desu Copula
na-Adjective
Negation Auxiliary

The polite negative form of 無骨一徹

1. Not rough and straightforward.; Not unrefined.; Not lacking in finesse.

Negative
Polite
Casual Register