すたれる
sutareru

Ichidan Verb

1. to go out of use; to become obsolete; to die out; to go out of fashion; to go out of style

Intransitive
その風習 ふうしゅうはすたれつつある。
sono fūshūwa sutaretsutsu aru.
That custom is on the decrease.
Ichidan Verb

2. to decline (e.g. of morals); to be lost; to go into decline (of a town, business, etc.)

Intransitive
Other forms: