正式じゃないです
seishikijanaidesu
polite negative: is not formal
N2
How to remember this word
A memory tip for this word is coming soon. For now, try linking it to a real moment from your day — words anchored to real situations stick best.
Example sentence
この会社は正式じゃないです。
この かいしゃ は せいしきじゃないです。
kono kaisha wa seishikijanaidesu.
This company polite negative: is not formal.
Usage note
Form of 正式 (formal / official).