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to pile up
[phrase form: pile]
01
to increase in amount or quantity over time
Intransitive
Examples
If you do n't address your issues, they 'll just pile up over time.
02
to stack things on top of each other
Transitive: to pile up sth
Examples
She piled up the dirty dishes in the sink.
03
to put a large quantity or group of things in one place or on top of one another
Transitive: to pile up sth
Examples
He 's been piling up antique collections from around the world.
