“变陈腐”常见的英文表达可以是 become stale 或 turn stale。
“stale”有“不新鲜的；陈腐的；过时的”等含义，“become stale” 和 “turn stale” 形象地描述了事物从原本新鲜的状态逐渐变得陈旧、失去活力或不再新颖的过程。例如：
This idea has begun to become stale and needs some innovation.（这个想法已经开始变陈腐了，需要一些创新。）
The jokes in the comedy show started to turn stale after being repeated too many times.（这个喜剧节目里的笑话重复太多次后开始变陈腐了。 ）