失効しない
shikkoushinai
plain negative: does not do expiration
N1
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
チームで失効しない。
ちーむ で しっこうしない。
chiimu de shikkoushinai.
We expiration as a team.
Usage note
する-verb form of 失効 (expiration / lapse).