千慮 せんりょ いち しつじゃありません
senryono ichishitsujārimasen

Noun
Desu Copula
Negation Auxiliary

The polite negative form of 千慮の一失

1. Not a thousand thoughts prevent a single mistake.; It's not that even with a thousand considerations, there's no possibility of error.

Negative
Polite
Terminal Form