Come learn 2000+ kanji and 6000+ vocabulary words with WaniKani.
noun, の adjective
A thing that's constant for a long time becomes permanent. Leave a shoe on the sidewalk for a long time? Permanently stuck there. Constantly making dumb faces? Permanently stuck like that.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
I pray for perpetual peace.