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We'll restock the shelves when our supplies dwindle.
Poverty approaches as our accounts dwindle.
The past tense of dwindle is dwindled.
How about "The vocabulary of America's Youth is starting to dwindle."? ;)
"Dwindle" means for something to gradually grow less or smaller
Dwindle means to slowly get smaller. The amount of water had started to dwindle because of the extremely hot summer's day.