dwindle
verb [ I ] uk/ˈdwɪn.dəl/ us/ˈdwɪn.dəl/
减小；降低；减少
to become smaller in size or amount, or fewer in number
The community has dwindled to a tenth of its former size in the last two years. 该社区在过去的两年里缩小到了原来的1/10。
Her hopes of success in the race dwindled last night as the weather became worse. 随着昨晚天气的恶化，她在比赛中获胜的希望减小了。