stock up

phrasal verb·1 sense·particle up

Meanings

1

Build a large supply

Increaseuncommon

Why “up”? More of something is higher. Quantity, intensity and speed all rise.

We stocked up on water before the storm.
We bought a large supply of water in preparation for the storm.
The shop stocked up on candles before the power cut.
The shop bought a large supply of candles before the power cut.

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We stocked up on water before the storm. What does it mean?

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