Definition
To undergo alternating periods of increase and decrease in strength or importance.
歸枯
The band's popularity has waxed and waned; sometimes they are very popular, and other times they are relatively unknown.
這個樂團的知名度起起落落；有時候他們非常受歡迎，有時候卻相對默默無聞。
The tourism industry in this small town waxes and wanes with the changing seasons.
這個小鎮的旅遊業隨著季節的變化而興衰。
His enthusiasm for the project has waxed and waned, which has been frustrating for the rest of the team.
他對這個專案的熱情時高時低，這讓團隊的其他成員感到沮喪。