fall by the wayside
US /fɔl baɪ ðə ˈweɪ.saɪd/
UK /fɔl baɪ ðə ˈweɪ.saɪd/

1.
半途而废, 失败, 被淘汰
to fail to continue with an activity or to be unsuccessful in achieving something
:
•
Many good ideas fall by the wayside due to lack of funding.
许多好主意因缺乏资金而半途而废。
•
He started a business, but it soon fell by the wayside.
他开了一家公司,但很快就失败了。