There are two sentences below,
- He stored the goods in the store.
- He stored up the goods in the store.
What is the difference between the two sentences? What is the function of the preposition 'up' here? Please, tell me.
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up there conveys the idea of "accumulation".
The squirrel accumulated acorns for the winter.
The squirrel stored up acorns for the winter.
Without up there is no sense of accumulation:
The leopard stored its kill in a tree.