無効 むこうSP えすぴいDU でぃうゆうではありません
mukō esu pii diuyūdewārimasen

Noun
Desu Copula
Negation Auxiliary

The polite negative form of 無効SPDU

1. Is not an invalid SPDU.; Is not a non-valid SPDU.

Negative
Polite
Formal Register
Computing