wane
verb [ I ] uk/weɪn/ us/weɪn/
衰减；减弱
to become weaker in strength or influence
By the late 70s the band's popularity was beginning to wane. 上世纪70年代末，这支乐队的人气开始下滑。
Synonyms: decline (GO DOWN)decrease diminishdrop (LOWER)ebb (FEELING)
formal（月亮）开始形成残月，亏缺
The moon wanes when it gradually appears less and less round, after the full moon.
Opposite: wax (MOON)
wane
noun uk/weɪn/ us/weɪn/
on the wane （权力、人气等）衰落，减弱
becoming less strong, powerful, popular, etc.
There are signs that support for the group is on the wane. 有迹象表明该组织的支持率正日益下降。
Synonym: ebb